diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index ef53eaf4302482e2614ea16142329bb4f9cd3b6d..a991ed1d414ee3c193d93bc69d16027c85a60ea7 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -2490,6 +2490,10 @@ function drupal_container(Container $new_container = NULL, $rebuild = FALSE) {
       ->register('keyvalue.database', 'Drupal\Core\KeyValueStore\KeyValueDatabaseFactory')
       ->addArgument(new Reference('database'));
 
+    $container->register('path.alias_manager', 'Drupal\Core\Path\AliasManager')
+      ->addArgument(new Reference('database'))
+      ->addArgument(new Reference('keyvalue.database'));
+
     // Register the EntityManager.
     $container->register('plugin.manager.entity', 'Drupal\Core\Entity\EntityManager');
   }
diff --git a/core/includes/common.inc b/core/includes/common.inc
index f8a54e97dfdb98680e46a889512ee1bcdf2c5032..1eb3b945d0dec790766dd220d7c8263f92603c2e 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -2208,7 +2208,7 @@ function url($path = NULL, array $options = array()) {
   }
   elseif (!empty($path) && !$options['alias']) {
     $langcode = isset($options['language']) && isset($options['language']->langcode) ? $options['language']->langcode : '';
-    $alias = drupal_get_path_alias($original_path, $langcode);
+    $alias = drupal_container()->get('path.alias_manager')->getPathAlias($original_path, $langcode);
     if ($alias != $original_path) {
       $path = $alias;
     }
@@ -4922,9 +4922,6 @@ function _drupal_bootstrap_full($skip = FALSE) {
   // current_path().
   drupal_language_initialize();
 
-  // Initialize current_path() prior to invoking hook_init().
-  drupal_path_initialize();
-
   // Let all modules take action before the menu system handles the request.
   // We do not want this while running update.php.
   if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 091d8986e100b70062e8687e5c8e4e02ed051704..2e553665f3d00839e681cd4380c265abc2476d99 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -2994,7 +2994,7 @@ function _menu_delete_item($item, $force = FALSE) {
  * @param $item
  *   An associative array representing a menu link item, with elements:
  *   - link_path: (required) The path of the menu item, which should be
- *     normalized first by calling drupal_get_normal_path() on it.
+ *     normalized first by calling drupal_container()->get('path.alias_manager')->getSystemPath() on it.
  *   - link_title: (required) Title to appear in menu for the link.
  *   - menu_name: (optional) The machine name of the menu for the link.
  *     Defaults to 'tools'.
diff --git a/core/includes/path.inc b/core/includes/path.inc
index dc878c0bc7011b7087b275682df221889472b2e5..ba7c0348cf75d687e916e4a9c9eb4cef1d182f28 100644
--- a/core/includes/path.inc
+++ b/core/includes/path.inc
@@ -2,296 +2,13 @@
 
 /**
  * @file
- * Functions to handle paths in Drupal, including path aliasing.
+ * Functions to handle paths in Drupal.
  *
  * These functions are not loaded for cached pages, but modules that need
  * to use them in hook_boot() or hook exit() can make them available, by
  * executing "drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);".
  */
 
-/**
- * Initializes the current path to the proper normal path.
- */
-function drupal_path_initialize() {
-  // At this point, the current path is either the request path (due to
-  // drupal_environment_initialize()) or some modified version of it due to
-  // other bootstrap code (e.g., language negotiation), but it has not yet been
-  // normalized by drupal_get_normal_path().
-  $path = _current_path();
-
-  // If on the front page, resolve to the front page path, including for calls
-  // to current_path() while drupal_get_normal_path() is in progress.
-  if (empty($path)) {
-    $path = config('system.site')->get('page.front');
-    _current_path($path);
-  }
-
-  // Normalize the path.
-  _current_path(drupal_get_normal_path($path));
-}
-
-/**
- * Given an alias, return its Drupal system URL if one exists. Given a Drupal
- * system URL return one of its aliases if such a one exists. Otherwise,
- * return FALSE.
- *
- * @param $action
- *   One of the following values:
- *   - wipe: delete the alias cache.
- *   - alias: return an alias for a given Drupal system path (if one exists).
- *   - source: return the Drupal system URL for a path alias (if one exists).
- * @param $path
- *   The path to investigate for corresponding aliases or system URLs.
- * @param $langcode
- *   Optional language code to search the path with. Defaults to the page language.
- *   If there's no path defined for that language it will search paths without
- *   language.
- *
- * @return
- *   Either a Drupal system path, an aliased path, or FALSE if no path was
- *   found.
- */
-function drupal_lookup_path($action, $path = '', $langcode = NULL) {
-  // Use the advanced drupal_static() pattern, since this is called very often.
-  static $drupal_static_fast;
-  if (!isset($drupal_static_fast)) {
-    $drupal_static_fast['cache'] = &drupal_static(__FUNCTION__);
-  }
-  $cache = &$drupal_static_fast['cache'];
-
-  if (!isset($cache)) {
-    $cache = array(
-      'map' => array(),
-      'no_source' => array(),
-      'whitelist' => NULL,
-      'system_paths' => array(),
-      'no_aliases' => array(),
-      'first_call' => TRUE,
-    );
-  }
-
-  // Retrieve the path alias whitelist.
-  if (!isset($cache['whitelist'])) {
-    $cache['whitelist'] = state()->get('system.path_alias_whitelist', NULL);
-    if (!isset($cache['whitelist'])) {
-      $cache['whitelist'] = drupal_path_alias_whitelist_rebuild();
-    }
-  }
-
-  // If no language is explicitly specified we default to the current URL
-  // language. If we used a language different from the one conveyed by the
-  // requested URL, we might end up being unable to check if there is a path
-  // alias matching the URL path.
-  $langcode = $langcode ? $langcode : language(LANGUAGE_TYPE_URL)->langcode;
-
-  if ($action == 'wipe') {
-    $cache = array();
-    $cache['whitelist'] = drupal_path_alias_whitelist_rebuild();
-  }
-  elseif ($cache['whitelist'] && $path != '') {
-    if ($action == 'alias') {
-      // During the first call to drupal_lookup_path() per language, load the
-      // expected system paths for the page from cache.
-      if (!empty($cache['first_call'])) {
-        $cache['first_call'] = FALSE;
-
-        $cache['map'][$langcode] = array();
-        // Load system paths from cache.
-        $cid = current_path();
-        if ($cached = cache('path')->get($cid)) {
-          $cache['system_paths'] = $cached->data;
-          // Now fetch the aliases corresponding to these system paths.
-          $args = array(
-            ':system' => $cache['system_paths'],
-            ':langcode' => $langcode,
-            ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
-          );
-          // Always get the language-specific alias before the language-neutral
-          // one. For example 'de' is less than 'und' so the order needs to be
-          // ASC, while 'xx-lolspeak' is more than 'und' so the order needs to
-          // be DESC. We also order by pid ASC so that fetchAllKeyed() returns
-          // the most recently created alias for each source. Subsequent queries
-          // using fetchField() must use pid DESC to have the same effect.
-          // For performance reasons, the query builder is not used here.
-          if ($langcode == LANGUAGE_NOT_SPECIFIED) {
-            // Prevent PDO from complaining about a token the query doesn't use.
-            unset($args[':langcode']);
-            $result = db_query('SELECT source, alias FROM {url_alias} WHERE source IN (:system) AND langcode = :langcode_undetermined ORDER BY pid ASC', $args);
-          }
-          elseif ($langcode < LANGUAGE_NOT_SPECIFIED) {
-            $result = db_query('SELECT source, alias FROM {url_alias} WHERE source IN (:system) AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid ASC', $args);
-          }
-          else {
-            $result = db_query('SELECT source, alias FROM {url_alias} WHERE source IN (:system) AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid ASC', $args);
-          }
-          $cache['map'][$langcode] = $result->fetchAllKeyed();
-          // Keep a record of paths with no alias to avoid querying twice.
-          $cache['no_aliases'][$langcode] = array_flip(array_diff_key($cache['system_paths'], array_keys($cache['map'][$langcode])));
-        }
-      }
-      // If the alias has already been loaded, return it.
-      if (isset($cache['map'][$langcode][$path])) {
-        return $cache['map'][$langcode][$path];
-      }
-      // Check the path whitelist, if the top_level part before the first /
-      // is not in the list, then there is no need to do anything further,
-      // it is not in the database.
-      elseif (!isset($cache['whitelist'][strtok($path, '/')])) {
-        return FALSE;
-      }
-      // For system paths which were not cached, query aliases individually.
-      elseif (!isset($cache['no_aliases'][$langcode][$path])) {
-        $args = array(
-          ':source' => $path,
-          ':langcode' => $langcode,
-          ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
-        );
-        // See the queries above.
-        if ($langcode == LANGUAGE_NOT_SPECIFIED) {
-          unset($args[':langcode']);
-          $alias = db_query("SELECT alias FROM {url_alias} WHERE source = :source AND langcode = :langcode_undetermined ORDER BY pid DESC", $args)->fetchField();
-        }
-        elseif ($langcode > LANGUAGE_NOT_SPECIFIED) {
-          $alias = db_query("SELECT alias FROM {url_alias} WHERE source = :source AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid DESC", $args)->fetchField();
-        }
-        else {
-          $alias = db_query("SELECT alias FROM {url_alias} WHERE source = :source AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid DESC", $args)->fetchField();
-        }
-        $cache['map'][$langcode][$path] = $alias;
-        return $alias;
-      }
-    }
-    // Check $no_source for this $path in case we've already determined that there
-    // isn't a path that has this alias
-    elseif ($action == 'source' && !isset($cache['no_source'][$langcode][$path])) {
-      // Look for the value $path within the cached $map
-      $source = FALSE;
-      if (!isset($cache['map'][$langcode]) || !($source = array_search($path, $cache['map'][$langcode]))) {
-        $args = array(
-          ':alias' => $path,
-          ':langcode' => $langcode,
-          ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
-        );
-        // See the queries above.
-        if ($langcode == LANGUAGE_NOT_SPECIFIED) {
-          unset($args[':langcode']);
-          $result = db_query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode = :langcode_undetermined ORDER BY pid DESC", $args);
-        }
-        elseif ($langcode > LANGUAGE_NOT_SPECIFIED) {
-          $result = db_query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid DESC", $args);
-        }
-        else {
-          $result = db_query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid DESC", $args);
-        }
-        if ($source = $result->fetchField()) {
-          $cache['map'][$langcode][$source] = $path;
-        }
-        else {
-          // We can't record anything into $map because we do not have a valid
-          // index and there is no need because we have not learned anything
-          // about any Drupal path. Thus cache to $no_source.
-          $cache['no_source'][$langcode][$path] = TRUE;
-        }
-      }
-      return $source;
-    }
-  }
-
-  return FALSE;
-}
-
-/**
- * Cache system paths for a page.
- *
- * Cache an array of the system paths available on each page. We assume
- * that aliases will be needed for the majority of these paths during
- * subsequent requests, and load them in a single query during
- * drupal_lookup_path().
- */
-function drupal_cache_system_paths() {
-  // Check if the system paths for this page were loaded from cache in this
-  // request to avoid writing to cache on every request.
-  $cache = &drupal_static('drupal_lookup_path', array());
-  if (empty($cache['system_paths']) && !empty($cache['map'])) {
-
-    // @todo Because we are not within the request scope at this time, we cannot
-    //   use current_path(), which would give us the system path to use as the
-    //   key. Instead we call _current_path(), which may give us the alias
-    //   instead. However, at lookup time the system path will be used as the
-    //   key, because it uses current_path(), and so it will be a cache miss.
-    //   There is a critical issue for fixing the path alias logic here:
-    //   http://drupal.org/node/1269742
-
-    // Generate a cache ID (cid) specifically for this page.
-    $cid = _current_path();
-    // The static $map array used by drupal_lookup_path() includes all
-    // system paths for the page request.
-    if ($paths = current($cache['map'])) {
-      $data = array_keys($paths);
-      $expire = REQUEST_TIME + (60 * 60 * 24);
-      cache('path')->set($cid, $data, $expire);
-    }
-  }
-}
-
-/**
- * Given an internal Drupal path, return the alias set by the administrator.
- *
- * If no path is provided, the function will return the alias of the current
- * page.
- *
- * @param $path
- *   An internal Drupal path.
- * @param $langcode
- *   An optional language code to look up the path in.
- *
- * @return
- *   An aliased path if one was found, or the original path if no alias was
- *   found.
- */
-function drupal_get_path_alias($path = NULL, $langcode = NULL) {
-  // If no path is specified, use the current page's path.
-  if ($path == NULL) {
-    $path = current_path();
-  }
-  $result = $path;
-  if ($alias = drupal_lookup_path('alias', $path, $langcode)) {
-    $result = $alias;
-  }
-  return $result;
-}
-
-/**
- * Given a path alias, return the internal path it represents.
- *
- * @param $path
- *   A Drupal path alias.
- * @param $langcode
- *   An optional language code to look up the path in.
- *
- * @return
- *   The internal path represented by the alias, or the original alias if no
- *   internal path was found.
- */
-function drupal_get_normal_path($path, $langcode = NULL) {
-  $original_path = $path;
-
-  // Lookup the path alias first.
-  if ($source = drupal_lookup_path('source', $path, $langcode)) {
-    $path = $source;
-  }
-
-  // Allow other modules to alter the inbound URL. We cannot use drupal_alter()
-  // here because we need to run hook_url_inbound_alter() in the reverse order
-  // of hook_url_outbound_alter().
-  foreach (array_reverse(module_implements('url_inbound_alter')) as $module) {
-    $function = $module . '_url_inbound_alter';
-    $function($path, $original_path, $langcode);
-  }
-
-  return $path;
-}
-
 /**
  * Check if the current page is the front page.
  *
@@ -378,36 +95,6 @@ function current_path() {
   return _current_path();
 }
 
-/**
- * Rebuild the path alias white list.
- *
- * @param $source
- *   An optional system path for which an alias is being inserted.
- *
- * @return
- *   An array containing a white list of path aliases.
- */
-function drupal_path_alias_whitelist_rebuild($source = NULL) {
-  // When paths are inserted, only rebuild the whitelist if the system path
-  // has a top level component which is not already in the whitelist.
-  if (!empty($source)) {
-    $whitelist = state()->get('system.path_alias_whitelist', NULL);
-    if (isset($whitelist[strtok($source, '/')])) {
-      return $whitelist;
-    }
-  }
-  // For each alias in the database, get the top level component of the system
-  // path it corresponds to. This is the portion of the path before the first
-  // '/', if present, otherwise the whole path itself.
-  $whitelist = array();
-  $result = db_query("SELECT DISTINCT SUBSTRING_INDEX(source, '/', 1) AS path FROM {url_alias}");
-  foreach ($result as $row) {
-    $whitelist[$row->path] = TRUE;
-  }
-  state()->set('system.path_alias_whitelist', $whitelist);
-  return $whitelist;
-}
-
 /**
  * Fetch a specific URL alias from the database.
  *
@@ -415,13 +102,7 @@ function drupal_path_alias_whitelist_rebuild($source = NULL) {
  *   A string representing the source, a number representing the pid, or an
  *   array of query conditions.
  *
- * @return
- *   FALSE if no alias was found or an associative array containing the
- *   following keys:
- *   - source: The internal system path.
- *   - alias: The URL alias.
- *   - pid: Unique path alias identifier.
- *   - langcode: The language code of the alias.
+ * @see \Drupal\Core\Path\Path::load()
  */
 function path_load($conditions) {
   if (is_numeric($conditions)) {
@@ -433,68 +114,7 @@ function path_load($conditions) {
   elseif (!is_array($conditions)) {
     return FALSE;
   }
-  $select = db_select('url_alias');
-  foreach ($conditions as $field => $value) {
-    $select->condition($field, $value);
-  }
-  return $select
-    ->fields('url_alias')
-    ->execute()
-    ->fetchAssoc();
-}
-
-/**
- * Save a path alias to the database.
- *
- * @param $path
- *   An associative array containing the following keys:
- *   - source: The internal system path.
- *   - alias: The URL alias.
- *   - pid: (optional) Unique path alias identifier.
- *   - langcode: (optional) The language code of the alias.
- */
-function path_save(&$path) {
-  $path += array('langcode' => LANGUAGE_NOT_SPECIFIED);
-
-  // Load the stored alias, if any.
-  if (!empty($path['pid']) && !isset($path['original'])) {
-    $path['original'] = path_load($path['pid']);
-  }
-
-  if (empty($path['pid'])) {
-    drupal_write_record('url_alias', $path);
-    module_invoke_all('path_insert', $path);
-  }
-  else {
-    drupal_write_record('url_alias', $path, array('pid'));
-    module_invoke_all('path_update', $path);
-  }
-
-  // Clear internal properties.
-  unset($path['original']);
-
-  // Clear the static alias cache.
-  drupal_clear_path_cache($path['source']);
-}
-
-/**
- * Delete a URL alias.
- *
- * @param $criteria
- *   A number representing the pid or an array of criteria.
- */
-function path_delete($criteria) {
-  if (!is_array($criteria)) {
-    $criteria = array('pid' => $criteria);
-  }
-  $path = path_load($criteria);
-  $query = db_delete('url_alias');
-  foreach ($criteria as $field => $value) {
-    $query->condition($field, $value);
-  }
-  $query->execute();
-  module_invoke_all('path_delete', $path);
-  drupal_clear_path_cache($path['source']);
+  return drupal_container()->get('path.crud')->load($conditions);
 }
 
 /**
@@ -597,14 +217,3 @@ function drupal_valid_path($path, $dynamic_allowed = FALSE) {
   return $item && $item['access'];
 }
 
-/**
- * Clear the path cache.
- *
- * @param $source
- *   An optional system path for which an alias is being changed.
- */
-function drupal_clear_path_cache($source = NULL) {
-  // Clear the drupal_lookup_path() static cache.
-  drupal_static_reset('drupal_lookup_path');
-  drupal_path_alias_whitelist_rebuild($source);
-}
diff --git a/core/lib/Drupal/Core/CacheDecorator/AliasManagerCacheDecorator.php b/core/lib/Drupal/Core/CacheDecorator/AliasManagerCacheDecorator.php
new file mode 100644
index 0000000000000000000000000000000000000000..ae5c8bca4fd0d72dddf49d9daef61baa7445bcdf
--- /dev/null
+++ b/core/lib/Drupal/Core/CacheDecorator/AliasManagerCacheDecorator.php
@@ -0,0 +1,124 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\CacheDecorator\AliasManagerCacheDecorator.
+ */
+
+namespace Drupal\Core\CacheDecorator;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Path\AliasManagerInterface;
+
+/**
+ * Class used by the PathSubscriber to get the system path and cache path lookups.
+ */
+class AliasManagerCacheDecorator implements CacheDecoratorInterface, AliasManagerInterface {
+
+  /**
+   * @var \Drupal\Core\Path\AliasManagerInterface
+   */
+  protected $aliasManager;
+
+  /**
+   * @var \Drupal\Core\Cache\CacheBackendInterface;
+   */
+  protected $cache;
+
+  /**
+   * Stack of request paths for use as cids when caching system paths.
+   *
+   * @var array
+   */
+  protected $cacheKeys = array();
+
+  /**
+   * Holds an array of previously cached paths based on a request path.
+   *
+   * @var array
+   */
+  protected $preloadedPathLookups = array();
+
+  /**
+   * Whether the cache needs to be written.
+   *
+   * @var boolean
+   */
+  protected $cacheNeedsWriting = TRUE;
+
+  /**
+   * Constructs a \Drupal\Core\CacheDecorator\AliasManagerCacheDecorator.
+   */
+  public function __construct(AliasManagerInterface $alias_manager, CacheBackendInterface $cache) {
+    $this->aliasManager = $alias_manager;
+    $this->cache = $cache;
+  }
+
+  /**
+   * Implements \Drupal\Core\CacheDecorator\CacheDecoratorInterface::setCacheKey().
+   */
+  public function setCacheKey($key) {
+    $this->cacheKeys[] = $key;
+  }
+
+  /**
+   * Implements \Drupal\Core\CacheDecorator\CacheDecoratorInterface::writeCache().
+   *
+   * Cache an array of the system paths available on each page. We assume
+   * that aliases will be needed for the majority of these paths during
+   * subsequent requests, and load them in a single query during path alias
+   * lookup.
+   */
+  public function writeCache() {
+    $path_lookups = $this->getPathLookups();
+    // Check if the system paths for this page were loaded from cache in this
+    // request to avoid writing to cache on every request.
+    if ($this->cacheNeedsWriting && !empty($path_lookups) && !empty($this->cacheKeys)) {
+      // Use the system path of the current request for the cache ID (cid).
+      $cid = end($this->cacheKeys);
+      // Set the path cache to expire in 24 hours.
+      $expire = REQUEST_TIME + (60 * 60 * 24);
+      $this->cache->set($cid, $path_lookups, $expire);
+    }
+    // We are at the end of the request, so pop off the last request path.
+    array_pop($this->cacheKeys);
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::getSystemPath().
+   */
+  public function getSystemPath($path, $path_language = NULL) {
+    $system_path = $this->aliasManager->getSystemPath($path, $path_language);
+    // We need to pass on the list of previously cached system paths for this
+    // key to the alias manager for use in subsequent lookups.
+    $cached = $this->cache->get($system_path);
+    $cached_paths = array();
+    if ($cached) {
+      $cached_paths = $cached->data;
+      $this->cacheNeedsWriting = FALSE;
+    }
+    $this->preloadPathLookups($cached_paths);
+    return $system_path;
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::getPathAlias().
+   */
+  public function getPathAlias($path, $path_language = NULL) {
+    return $this->aliasManager->getPathAlias($path, $path_language);
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::getPathLookups().
+   */
+  public function getPathLookups() {
+    return $this->aliasManager->getPathLookups();
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::preloadPathLookups().
+   */
+  public function preloadPathLookups(array $path_list) {
+    $this->aliasManager->preloadPathLookups($path_list);
+  }
+}
diff --git a/core/lib/Drupal/Core/CacheDecorator/CacheDecoratorInterface.php b/core/lib/Drupal/Core/CacheDecorator/CacheDecoratorInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..574d81ab26672ce1cd9900fde44803739c7386df
--- /dev/null
+++ b/core/lib/Drupal/Core/CacheDecorator/CacheDecoratorInterface.php
@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\CacheDecorator\CacheDecoratorInterface.
+ */
+
+namespace Drupal\Core\CacheDecorator;
+
+/**
+ * Defines an interface for cache decorator implementations.
+ */
+interface CacheDecoratorInterface {
+
+  /**
+   * Specify the key to use when writing the cache.
+   */
+  public function setCacheKey($key);
+
+  /**
+   * Write the cache.
+   */
+  public function writeCache();
+
+}
diff --git a/core/lib/Drupal/Core/CoreBundle.php b/core/lib/Drupal/Core/CoreBundle.php
index 48684e50d0eb2430cf8c883af77f4237025fc0ee..a32bf90b3914ff658b830c0c5f2678702ef02435 100644
--- a/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -13,6 +13,7 @@
 use Drupal\Core\DependencyInjection\Compiler\RegisterSerializationClassesPass;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Scope;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
@@ -82,6 +83,20 @@ public function build(ContainerBuilder $container) {
     $container->register('nested_matcher', 'Drupal\Core\Routing\NestedMatcher')
       ->addTag('chained_matcher', array('priority' => 5));
 
+    $container
+      ->register('cache.path', 'Drupal\Core\Cache\CacheBackendInterface')
+      ->setFactoryClass('Drupal\Core\Cache\CacheFactory')
+      ->setFactoryMethod('get')
+      ->addArgument('path');
+
+    $container->register('path.alias_manager.cached', 'Drupal\Core\CacheDecorator\AliasManagerCacheDecorator')
+      ->addArgument(new Reference('path.alias_manager'))
+      ->addArgument(new Reference('cache.path'));
+
+    $container->register('path.crud', 'Drupal\Core\Path\Path')
+      ->addArgument(new Reference('database'))
+      ->addArgument(new Reference('path.alias_manager'));
+
     // The following services are tagged as 'nested_matcher' services and are
     // processed in the RegisterNestedMatchersPass compiler pass. Each one
     // needs to be set on the matcher using a different method, so we use a
@@ -110,6 +125,7 @@ public function build(ContainerBuilder $container) {
     $container->register('maintenance_mode_subscriber', 'Drupal\Core\EventSubscriber\MaintenanceModeSubscriber')
       ->addTag('event_subscriber');
     $container->register('path_subscriber', 'Drupal\Core\EventSubscriber\PathSubscriber')
+      ->addArgument(new Reference('path.alias_manager.cached'))
       ->addTag('event_subscriber');
     $container->register('legacy_request_subscriber', 'Drupal\Core\EventSubscriber\LegacyRequestSubscriber')
       ->addTag('event_subscriber');
diff --git a/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php
index 7688107ce30d748045b00a5f6c4e21229e179367..8f0359d3cef3ddcf9cb8a640de1e5147f5f4b41f 100644
--- a/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php
@@ -7,8 +7,10 @@
 
 namespace Drupal\Core\EventSubscriber;
 
+use Drupal\Core\CacheDecorator\AliasManagerCacheDecorator;
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\Event\PostResponseEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
@@ -16,23 +18,31 @@
  */
 class PathSubscriber extends PathListenerBase implements EventSubscriberInterface {
 
+  protected $aliasManager;
+
+  public function __construct(AliasManagerCacheDecorator $alias_manager) {
+    $this->aliasManager = $alias_manager;
+  }
+
   /**
    * Resolve the system path.
    *
-   * @todo The path system should be objectified to remove the function calls in
-   *   this method.
-   *
    * @param Symfony\Component\HttpKernel\Event\GetResponseEvent $event
    *   The Event to process.
    */
   public function onKernelRequestPathResolve(GetResponseEvent $event) {
     $request = $event->getRequest();
-
     $path = $this->extractPath($request);
-
-    $path = drupal_get_normal_path($path);
-
+    $path = $this->aliasManager->getSystemPath($path);
     $this->setPath($request, $path);
+    $this->aliasManager->setCacheKey($path);
+  }
+
+  /**
+   * Ensures system paths for the request get cached.
+   */
+  public function onKernelTerminate(PostResponseEvent $event) {
+    $this->aliasManager->writeCache();
   }
 
   /**
@@ -116,6 +126,7 @@ static function getSubscribedEvents() {
     $events[KernelEvents::REQUEST][] = array('onKernelRequestLanguageResolve', 150);
     $events[KernelEvents::REQUEST][] = array('onKernelRequestFrontPageResolve', 101);
     $events[KernelEvents::REQUEST][] = array('onKernelRequestPathResolve', 100);
+    $events[KernelEvents::TERMINATE][] = array('onKernelTerminate', 200);
 
     return $events;
   }
diff --git a/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php
index 175ce79bb5b3eca801e2ac9dd431801b65feb7e3..8d5f87a6ac46e0d06353ec6932998550adb5bdf1 100644
--- a/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/RequestCloseSubscriber.php
@@ -29,7 +29,6 @@ class RequestCloseSubscriber implements EventSubscriberInterface {
    */
   public function onTerminate(PostResponseEvent $event) {
     module_invoke_all('exit');
-    drupal_cache_system_paths();
     module_implements_write_cache();
     system_run_automated_cron();
   }
@@ -41,7 +40,7 @@ public function onTerminate(PostResponseEvent $event) {
    *   An array of event listener definitions.
    */
   static function getSubscribedEvents() {
-    $events[KernelEvents::TERMINATE][] = array('onTerminate');
+    $events[KernelEvents::TERMINATE][] = array('onTerminate', 100);
 
     return $events;
   }
diff --git a/core/lib/Drupal/Core/ExceptionController.php b/core/lib/Drupal/Core/ExceptionController.php
index e311c93aad6e51db60a18c294bf8cde7adb5b262..92d44547045085d38b05a76215b5fb82a46e165d 100644
--- a/core/lib/Drupal/Core/ExceptionController.php
+++ b/core/lib/Drupal/Core/ExceptionController.php
@@ -101,7 +101,7 @@ public function on403Html(FlattenException $exception, Request $request) {
     $system_path = $request->attributes->get('system_path');
     watchdog('access denied', $system_path, array(), WATCHDOG_WARNING);
 
-    $path = drupal_get_normal_path(config('system.site')->get('page.403'));
+    $path = $this->container->get('path.alias_manager')->getSystemPath(config('system.site')->get('page.403'));
     if ($path && $path != $system_path) {
       // Keep old path for reference, and to allow forms to redirect to it.
       if (!isset($_GET['destination'])) {
@@ -173,7 +173,7 @@ public function on404Html(FlattenException $exception, Request $request) {
       $_GET['destination'] = $system_path;
     }
 
-    $path = drupal_get_normal_path(config('system.site')->get('page.404'));
+    $path = $this->container->get('path.alias_manager')->getSystemPath(config('system.site')->get('page.404'));
     if ($path && $path != $system_path) {
       // @todo Um, how do I specify an override URL again? Totally not clear. Do
       //   that and sub-call the kernel rather than using meah().
diff --git a/core/lib/Drupal/Core/Path/AliasManager.php b/core/lib/Drupal/Core/Path/AliasManager.php
new file mode 100644
index 0000000000000000000000000000000000000000..02433ce126c189e3176a28774f42cd3b85b8da9a
--- /dev/null
+++ b/core/lib/Drupal/Core/Path/AliasManager.php
@@ -0,0 +1,320 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Path\AliasManager.
+ */
+
+namespace Drupal\Core\Path;
+
+use Drupal\Core\Database\Connection;
+use Drupal\Core\KeyValueStore\KeyValueDatabaseFactory;
+
+class AliasManager implements AliasManagerInterface {
+
+  /**
+   * The database connectino to use for path lookups.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $connection;
+
+  /**
+   * The Key/Value Store to use for state
+   *
+   * @var \Drupal\Core\KeyValueStore\DatabaseStorage
+   */
+  protected $state;
+
+  /**
+   * The default langcode to use when none is specified for path lookups.
+   *
+   * @var string
+   */
+  protected $langcode;
+
+  /**
+   * Holds the map of path lookups per language.
+   *
+   * @var array
+   */
+  protected $lookupMap = array();
+
+  /**
+   * Holds an array of path alias for which no source was found.
+   *
+   * @var array
+   */
+  protected $noSource = array();
+
+  /**
+   * Holds the array of whitelisted path aliases.
+   *
+   * @var array
+   */
+  protected $whitelist;
+
+  /**
+   * Holds an array of system paths that have no aliases.
+   *
+   * @var array
+   */
+  protected $noAliases = array();
+
+  /**
+   * Whether lookupPath() has not yet been called.
+   *
+   * @var boolean
+   */
+  protected $firstLookup = TRUE;
+
+  /**
+   * Holds an array of previously looked up paths for the current request path.
+   *
+   * This will only ever get populated if the alias manager is being used in
+   * the context of a request.
+   *
+   * @var array
+   */
+  protected $preloadedPathLookups = array();
+
+  public function __construct(Connection $connection, KeyValueDatabaseFactory $keyvalue) {
+    $this->connection = $connection;
+    $this->state = $keyvalue->get('state');
+    $this->langcode = language(LANGUAGE_TYPE_URL)->langcode;
+    $this->whitelist = $this->state->get('system.path_alias_whitelist', NULL);
+    if (!isset($this->whitelist)) {
+      $this->whitelist = $this->pathAliasWhitelistRebuild();
+    }
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::getSystemPath().
+   */
+  public function getSystemPath($path, $path_language = NULL) {
+    // If no language is explicitly specified we default to the current URL
+    // language. If we used a language different from the one conveyed by the
+    // requested URL, we might end up being unable to check if there is a path
+    // alias matching the URL path.
+    $path_language = $path_language ?: $this->langcode;
+    $original_path = $path;
+    // Lookup the path alias first.
+    if (!empty($path) && $source = $this->lookupPathSource($path, $path_language)) {
+      $path = $source;
+    }
+
+    return $path;
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::getPathAlias().
+   */
+  public function getPathAlias($path, $path_language = NULL) {
+    // If no language is explicitly specified we default to the current URL
+    // language. If we used a language different from the one conveyed by the
+    // requested URL, we might end up being unable to check if there is a path
+    // alias matching the URL path.
+    $path_language = $path_language ?: $this->langcode;
+    $result = $path;
+    if (!empty($path) && $alias = $this->lookupPathAlias($path, $path_language)) {
+      $result = $alias;
+    }
+    return $result;
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::cacheClear().
+   */
+  public function cacheClear($source = NULL) {
+    $this->lookupMap = array();
+    $this->noSource = array();
+    $this->no_aliases = array();
+    $this->firstCall = TRUE;
+    $this->preloadedPathLookups = array();
+    $this->whitelist = $this->pathAliasWhitelistRebuild($source);
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::getPathLookups().
+   */
+  public function getPathLookups() {
+    $current = current($this->lookupMap);
+    if ($current) {
+      return array_keys($current);
+    }
+    return array();
+  }
+
+  /**
+   * Implements \Drupal\Core\Path\AliasManagerInterface::preloadPathLookups().
+   */
+  public function preloadPathLookups(array $path_list) {
+    $this->preloadedPathLookups = $path_list;
+  }
+
+  /**
+   * Given a Drupal system URL return one of its aliases if such a one exists.
+   * Otherwise, return FALSE.
+
+   * @param $path
+   *   The path to investigate for corresponding aliases.
+   * @param $langcode
+   *   Optional language code to search the path with. Defaults to the page language.
+   *   If there's no path defined for that language it will search paths without
+   *   language.
+   *
+   * @return
+   *   An aliased path, or FALSE if no path was found.
+   */
+  protected function lookupPathAlias($path, $langcode) {
+    // During the first call to this method per language, load the expected
+    // system paths for the page from cache.
+    if (!empty($this->firstLookup)) {
+      $this->firstLookup = FALSE;
+      $this->lookupMap[$langcode] = array();
+      // Load system paths from cache.
+      if (!empty($this->preloadedPathLookups)) {
+        // Now fetch the aliases corresponding to these system paths.
+        $args = array(
+          ':system' => $this->preloadedPathLookups,
+          ':langcode' => $langcode,
+          ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
+        );
+        // Always get the language-specific alias before the language-neutral
+        // one. For example 'de' is less than 'und' so the order needs to be
+        // ASC, while 'xx-lolspeak' is more than 'und' so the order needs to
+        // be DESC. We also order by pid ASC so that fetchAllKeyed() returns
+        // the most recently created alias for each source. Subsequent queries
+        // using fetchField() must use pid DESC to have the same effect.
+        // For performance reasons, the query builder is not used here.
+        if ($langcode == LANGUAGE_NOT_SPECIFIED) {
+          // Prevent PDO from complaining about a token the query doesn't use.
+          unset($args[':langcode']);
+          $result = $this->connection->query('SELECT source, alias FROM {url_alias} WHERE source IN (:system) AND langcode = :langcode_undetermined ORDER BY pid ASC', $args);
+        }
+        elseif ($langcode < LANGUAGE_NOT_SPECIFIED) {
+          $result = $this->connection->query('SELECT source, alias FROM {url_alias} WHERE source IN (:system) AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid ASC', $args);
+        }
+        else {
+          $result = $this->connection->query('SELECT source, alias FROM {url_alias} WHERE source IN (:system) AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid ASC', $args);
+        }
+        $this->lookupMap[$langcode] = $result->fetchAllKeyed();
+        // Keep a record of paths with no alias to avoid querying twice.
+        $this->noAliases[$langcode] = array_flip(array_diff_key($this->preloadedPathLookups, array_keys($this->lookupMap[$langcode])));
+      }
+    }
+    // If the alias has already been loaded, return it.
+    if (isset($this->lookupMap[$langcode][$path])) {
+      return $this->lookupMap[$langcode][$path];
+    }
+    // Check the path whitelist, if the top-level part before the first /
+    // is not in the list, then there is no need to do anything further,
+    // it is not in the database.
+    elseif (!isset($this->whitelist[strtok($path, '/')])) {
+      return FALSE;
+    }
+    // For system paths which were not cached, query aliases individually.
+    elseif (!isset($this->noAliases[$langcode][$path])) {
+      $args = array(
+        ':source' => $path,
+        ':langcode' => $langcode,
+        ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
+      );
+      // See the queries above.
+      if ($langcode == LANGUAGE_NOT_SPECIFIED) {
+        unset($args[':langcode']);
+        $alias = $this->connection->query("SELECT alias FROM {url_alias} WHERE source = :source AND langcode = :langcode_undetermined ORDER BY pid DESC", $args)->fetchField();
+      }
+      elseif ($langcode > LANGUAGE_NOT_SPECIFIED) {
+        $alias = $this->connection->query("SELECT alias FROM {url_alias} WHERE source = :source AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid DESC", $args)->fetchField();
+      }
+      else {
+        $alias = $this->connection->query("SELECT alias FROM {url_alias} WHERE source = :source AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid DESC", $args)->fetchField();
+      }
+      $this->lookupMap[$langcode][$path] = $alias;
+      return $alias;
+    }
+    return FALSE;
+  }
+
+  /**
+   * Given an alias, return its Drupal system URL if one exists. Otherwise,
+   * return FALSE.
+   *
+   * @param $path
+   *   The path to investigate for corresponding system URLs.
+   * @param $langcode
+   *   Optional language code to search the path with. Defaults to the page language.
+   *   If there's no path defined for that language it will search paths without
+   *   language.
+   *
+   * @return
+   *   A Drupal system path, or FALSE if no path was found.
+   */
+  protected function lookupPathSource($path, $langcode) {
+    if ($this->whitelist && !isset($this->noSource[$langcode][$path])) {
+      // Look for the value $path within the cached $map
+      $source = FALSE;
+      if (!isset($this->lookupMap[$langcode]) || !($source = array_search($path, $this->lookupMap[$langcode]))) {
+        $args = array(
+          ':alias' => $path,
+          ':langcode' => $langcode,
+          ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
+        );
+        // See the queries above.
+        if ($langcode == LANGUAGE_NOT_SPECIFIED) {
+          unset($args[':langcode']);
+          $result = $this->connection->query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode = :langcode_undetermined ORDER BY pid DESC", $args);
+        }
+        elseif ($langcode > LANGUAGE_NOT_SPECIFIED) {
+          $result = $this->connection->query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid DESC", $args);
+        }
+        else {
+          $result = $this->connection->query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid DESC", $args);
+        }
+        if ($source = $result->fetchField()) {
+          $this->lookupMap[$langcode][$source] = $path;
+        }
+        else {
+          // We can't record anything into $map because we do not have a valid
+          // index and there is no need because we have not learned anything
+          // about any Drupal path. Thus cache to $no_source.
+          $this->noSource[$langcode][$path] = TRUE;
+        }
+      }
+      return $source;
+    }
+    return FALSE;
+  }
+
+  /**
+   * Rebuild the path alias white list.
+   *
+   * @param $source
+   *   An optional system path for which an alias is being inserted.
+   *
+   * @return
+   *   An array containing a white list of path aliases.
+   */
+  protected function pathAliasWhitelistRebuild($source = NULL) {
+    // When paths are inserted, only rebuild the whitelist if the system path
+    // has a top level component which is not already in the whitelist.
+    if (!empty($source)) {
+      // @todo Inject state so we don't have this function call.
+      $whitelist = $this->state->get('system.path_alias_whitelist', NULL);
+      if (isset($whitelist[strtok($source, '/')])) {
+        return $whitelist;
+      }
+    }
+    // For each alias in the database, get the top level component of the system
+    // path it corresponds to. This is the portion of the path before the first
+    // '/', if present, otherwise the whole path itself.
+    $whitelist = array();
+    $result = $this->connection->query("SELECT DISTINCT SUBSTRING_INDEX(source, '/', 1) AS path FROM {url_alias}");
+    foreach ($result as $row) {
+      $whitelist[$row->path] = TRUE;
+    }
+    $this->state->set('system.path_alias_whitelist', $whitelist);
+    return $whitelist;
+  }
+}
diff --git a/core/lib/Drupal/Core/Path/AliasManagerInterface.php b/core/lib/Drupal/Core/Path/AliasManagerInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..3dedd3e9737519f0acea1f90db668786ded09070
--- /dev/null
+++ b/core/lib/Drupal/Core/Path/AliasManagerInterface.php
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Path\AliasManagerInterface.
+ */
+
+namespace Drupal\Core\Path;
+
+interface AliasManagerInterface {
+
+  /**
+   * Given a path alias, return the internal path it represents.
+   *
+   * @param $path
+   *   A Drupal path alias.
+   * @param $path_language
+   *   An optional language code to look up the path in.
+   *
+   * @return
+   *   The internal path represented by the alias, or the original alias if no
+   *   internal path was found.
+   */
+  public function getSystemPath($path, $path_language = NULL);
+
+  /**
+   * Given an internal Drupal path, return the alias set by the administrator.
+   *
+   * @param $path
+   *   An internal Drupal path.
+   *
+   * @param $path_language
+   *   An optional language code to look up the path in.
+   *
+   * @return
+   *   An aliased path if one was found, or the original path if no alias was
+   *   found.
+   */
+  public function getPathAlias($path, $path_language = NULL);
+
+  /**
+   * Returns an array of system paths that have been looked up.
+   *
+   * @return array
+   *   An array of all system paths that have been looked up during the current
+   *   request.
+   */
+  public function getPathLookups();
+
+  /**
+   * Preload a set of paths for bulk alias lookups.
+   *
+   * @param $path_list
+   *   An array of system paths.
+   */
+  public function preloadPathLookups(array $path_list);
+}
diff --git a/core/lib/Drupal/Core/Path/Path.php b/core/lib/Drupal/Core/Path/Path.php
new file mode 100644
index 0000000000000000000000000000000000000000..a7fd55aeade58fd0c57dd34d1813785e75db7004
--- /dev/null
+++ b/core/lib/Drupal/Core/Path/Path.php
@@ -0,0 +1,144 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Path\Path.
+ */
+
+namespace Drupal\Core\Path;
+
+use Drupal\Core\Database\Database;
+use Drupal\Core\Database\Connection;
+
+/**
+ * Defines a class for CRUD operations on path aliases.
+ */
+class Path {
+
+  /**
+   * The database connection.
+   *
+   * @var \Drupal\Core\Database\Connection
+   */
+  protected $connection;
+
+  /**
+   * Constructs a Path CRUD object.
+   *
+   * @param \Drupal\Core\Database\Connection $connection
+   *   A database connection for reading and writing path aliases.
+   *
+   * @param \Drupal\Core\Path\AliasManager $alias_manager
+   *   An alias manager with an internal cache of stored aliases.
+   *
+   * @todo This class should not take an alias manager in its constructor. Once
+   *   we move to firing an event for CRUD operations instead of invoking a
+   *   hook, we can have a listener that calls cacheClear() on the alias manager.
+   */
+  public function __construct(Connection $connection, AliasManager $alias_manager) {
+    $this->connection = $connection;
+    $this->alias_manager = $alias_manager;
+  }
+
+  /**
+   * Saves a path alias to the database.
+   *
+   * @param string $source
+   *   The internal system path.
+   *
+   * @param string $alias
+   *   The URL alias.
+   *
+   * @param string $langcode
+   *   The language code of the alias.
+   *
+   * @param int $pid
+   *   Unique path alias identifier.
+   *
+   * @return
+   *   FALSE if the path could not be saved or an associative array containing
+   *   the following keys:
+   *   - source: The internal system path.
+   *   - alias: The URL alias.
+   *   - pid: Unique path alias identifier.
+   *   - langcode: The language code of the alias.
+   */
+  public function save($source, $alias, $langcode = LANGUAGE_NOT_SPECIFIED, $pid = NULL) {
+
+    $fields = array(
+      'source' => $source,
+      'alias' => $alias,
+      'langcode' => $langcode,
+    );
+
+    // Insert or update the alias.
+    if (empty($pid)) {
+      $query = $this->connection->insert('url_alias')
+        ->fields($fields);
+      $pid = $query->execute();
+      $fields['pid'] = $pid;
+      // @todo: Find a correct place to invoke hook_path_insert().
+      $hook = 'path_insert';
+    }
+    else {
+      $fields['pid'] = $pid;
+      $query = $this->connection->update('url_alias')
+        ->fields($fields)
+        ->condition('pid', $pid);
+      $pid = $query->execute();
+      // @todo: figure out where we can invoke hook_path_update()
+      $hook = 'path_update';
+    }
+    if ($pid) {
+      // @todo Switch to using an event for this instead of a hook.
+      module_invoke_all($hook, $fields);
+      $this->alias_manager->cacheClear();
+      return $fields;
+    }
+    return FALSE;
+  }
+
+  /**
+   * Fetches a specific URL alias from the database.
+   *
+   * @param $conditions
+   *   An array of query conditions.
+   *
+   * @return
+   *   FALSE if no alias was found or an associative array containing the
+   *   following keys:
+   *   - source: The internal system path.
+   *   - alias: The URL alias.
+   *   - pid: Unique path alias identifier.
+   *   - langcode: The language code of the alias.
+   */
+  public function load($conditions) {
+    $select = $this->connection->select('url_alias');
+    foreach ($conditions as $field => $value) {
+      $select->condition($field, $value);
+    }
+    return $select
+      ->fields('url_alias')
+      ->execute()
+      ->fetchAssoc();
+  }
+
+  /**
+   * Deletes a URL alias.
+   *
+   * @param array $conditions
+   *   An array of criteria.
+   */
+  public function delete($conditions) {
+    $path = $this->load($conditions);
+    $query = $this->connection->delete('url_alias');
+    foreach ($conditions as $field => $value) {
+      $query->condition($field, $value);
+    }
+    $deleted = $query->execute();
+    // @todo Switch to using an event for this instead of a hook.
+    module_invoke_all('path_delete', $path);
+    $this->alias_manager->cacheClear();
+    return $deleted;
+  }
+}
diff --git a/core/modules/block/block.module b/core/modules/block/block.module
index 2978146d45f4a8488910ad805946384a46177185..7340c6bb87198127b37d2b90f913ac33387fb602 100644
--- a/core/modules/block/block.module
+++ b/core/modules/block/block.module
@@ -851,7 +851,7 @@ function block_block_list_alter(&$blocks) {
       if ($block->visibility < BLOCK_VISIBILITY_PHP) {
         // Compare the lowercase path alias (if any) and internal path.
         $path = current_path();
-        $path_alias = drupal_strtolower(drupal_get_path_alias($path));
+        $path_alias = drupal_strtolower(drupal_container()->get('path.alias_manager')->getPathAlias($path));
         $page_match = drupal_match_path($path_alias, $pages) || (($path != $path_alias) && drupal_match_path($path, $pages));
         // When $block->visibility has a value of 0 (BLOCK_VISIBILITY_NOTLISTED),
         // the block is displayed on all pages except those listed in $block->pages.
diff --git a/core/modules/locale/lib/Drupal/locale/Tests/LocalePathTest.php b/core/modules/locale/lib/Drupal/locale/Tests/LocalePathTest.php
index bafb62078dcc86515cda9e8a8ce6d71daef70903..d1ad5f069529a208292c10823fe70d5d8d912546 100644
--- a/core/modules/locale/lib/Drupal/locale/Tests/LocalePathTest.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocalePathTest.php
@@ -109,13 +109,13 @@ function testPathLanguageConfiguration() {
       'alias'    => $custom_path,
       'langcode' => LANGUAGE_NOT_SPECIFIED,
     );
-    path_save($edit);
-    $lookup_path = drupal_lookup_path('alias', 'node/' . $node->nid, 'en');
+    drupal_container()->get('path.crud')->save($edit['source'], $edit['alias'], $edit['langcode']);
+    $lookup_path = drupal_container()->get('path.alias_manager')->getPathAlias('node/' . $node->nid, 'en');
     $this->assertEqual($english_path, $lookup_path, t('English language alias has priority.'));
     // Same check for language 'xx'.
-    $lookup_path = drupal_lookup_path('alias', 'node/' . $node->nid, $prefix);
+    $lookup_path = drupal_container()->get('path.alias_manager')->getPathAlias('node/' . $node->nid, $prefix);
     $this->assertEqual($custom_language_path, $lookup_path, t('Custom language alias has priority.'));
-    path_delete($edit);
+    drupal_container()->get('path.crud')->delete($edit);
 
     // Create language nodes to check priority of aliases.
     $first_node = $this->drupalCreateNode(array('type' => 'page', 'promote' => 1));
@@ -127,7 +127,7 @@ function testPathLanguageConfiguration() {
       'alias'    => $custom_path,
       'langcode' => 'en',
     );
-    path_save($edit);
+    drupal_container()->get('path.crud')->save($edit['source'], $edit['alias'], $edit['langcode']);
 
     // Assign a custom path alias to second node with LANGUAGE_NOT_SPECIFIED.
     $edit = array(
@@ -135,7 +135,7 @@ function testPathLanguageConfiguration() {
       'alias'    => $custom_path,
       'langcode' => LANGUAGE_NOT_SPECIFIED,
     );
-    path_save($edit);
+    drupal_container()->get('path.crud')->save($edit['source'], $edit['alias'], $edit['langcode']);
 
     // Test that both node titles link to our path alias.
     $this->drupalGet('<front>');
diff --git a/core/modules/menu/menu.admin.inc b/core/modules/menu/menu.admin.inc
index 3b67b97e59da79fdb8fde1af92051c2a5eb3b9fb..605f8983690c8c72f663760c1cc647ed5d49463e 100644
--- a/core/modules/menu/menu.admin.inc
+++ b/core/modules/menu/menu.admin.inc
@@ -417,7 +417,7 @@ function menu_edit_item($form, &$form_state, $type, $item, $menu) {
  */
 function menu_edit_item_validate($form, &$form_state) {
   $item = &$form_state['values'];
-  $normal_path = drupal_get_normal_path($item['link_path']);
+  $normal_path = drupal_container()->get('path.alias_manager')->getSystemPath($item['link_path']);
   if ($item['link_path'] != $normal_path) {
     drupal_set_message(t('The menu system stores system paths only, but will use the URL alias for display. %link_path has been stored as %normal_path', array('%link_path' => $item['link_path'], '%normal_path' => $normal_path)));
     $item['link_path'] = $normal_path;
diff --git a/core/modules/path/lib/Drupal/path/Tests/PathAliasTest.php b/core/modules/path/lib/Drupal/path/Tests/PathAliasTest.php
index 181bd727248b762c63ebcb76b5da9f2fbaf29a7c..416827518eee64ee800a5df3feb36b8f2eec4f78 100644
--- a/core/modules/path/lib/Drupal/path/Tests/PathAliasTest.php
+++ b/core/modules/path/lib/Drupal/path/Tests/PathAliasTest.php
@@ -57,9 +57,7 @@ function testPathCache() {
     // Visit the alias for the node and confirm a cache entry is created.
     cache('path')->flush();
     $this->drupalGet($edit['alias']);
-    // @todo The alias should actually have been cached with the system path as
-    // the key, see the todo in drupal_cache_system_paths() in path.inc.
-    $this->assertTrue(cache('path')->get($edit['alias']), 'Cache entry was created.');
+    $this->assertTrue(cache('path')->get($edit['source']), 'Cache entry was created.');
   }
 
   /**
@@ -94,7 +92,7 @@ function testAdminAlias() {
     $this->assertText($node1->label(), 'Changed alias works.');
     $this->assertResponse(200);
 
-    drupal_static_reset('drupal_lookup_path');
+    drupal_container()->get('path.alias_manager')->cacheClear();
     // Confirm that previous alias no longer works.
     $this->drupalGet($previous);
     $this->assertNoText($node1->label(), 'Previous alias no longer works.');
diff --git a/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php b/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php
index e6fd10decec08b15136fe5b70d2cb0084bcba2e3..83be7b5b6669e8a6e203106b586b8e2bb6c6dde8 100644
--- a/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php
+++ b/core/modules/path/lib/Drupal/path/Tests/PathLanguageTest.php
@@ -82,7 +82,7 @@ function testAliasTranslation() {
     $this->drupalPost(NULL, $edit, t('Save'));
 
     // Clear the path lookup cache.
-    drupal_lookup_path('wipe');
+    drupal_container()->get('path.alias_manager')->cacheClear();
 
     // Ensure the node was created.
     $french_node = $this->drupalGetNodeByTitle($edit["title"]);
@@ -121,7 +121,7 @@ function testAliasTranslation() {
     // We need to ensure that the user language preference is not taken into
     // account while determining the path alias language, because if this
     // happens we have no way to check that the path alias is valid: there is no
-    // path alias for French matching the english alias. So drupal_lookup_path()
+    // path alias for French matching the english alias. So the alias manager
     // needs to use the URL language to check whether the alias is valid.
     $this->drupalGet($english_alias);
     $this->assertText($english_node->label(), 'Alias for English translation works.');
@@ -145,20 +145,20 @@ function testAliasTranslation() {
     $this->drupalGet($french_alias);
     $this->assertResponse(404, 'Alias for French translation is unavailable when URL language negotiation is disabled.');
 
-    // drupal_lookup_path() has an internal static cache. Check to see that
+    // The alias manager has an internal path lookup cache. Check to see that
     // it has the appropriate contents at this point.
-    drupal_lookup_path('wipe');
-    $french_node_path = drupal_lookup_path('source', $french_alias, $french_node->langcode);
+    drupal_container()->get('path.alias_manager')->cacheClear();
+    $french_node_path = drupal_container()->get('path.alias_manager')->getSystemPath($french_alias, $french_node->langcode);
     $this->assertEqual($french_node_path, 'node/' . $french_node->nid, 'Normal path works.');
     // Second call should return the same path.
-    $french_node_path = drupal_lookup_path('source', $french_alias, $french_node->langcode);
+    $french_node_path = drupal_container()->get('path.alias_manager')->getSystemPath($french_alias, $french_node->langcode);
     $this->assertEqual($french_node_path, 'node/' . $french_node->nid, 'Normal path is the same.');
 
     // Confirm that the alias works.
-    $french_node_alias = drupal_lookup_path('alias', 'node/' . $french_node->nid, $french_node->langcode);
+    $french_node_alias = drupal_container()->get('path.alias_manager')->getPathAlias('node/' . $french_node->nid, $french_node->langcode);
     $this->assertEqual($french_node_alias, $french_alias, 'Alias works.');
     // Second call should return the same alias.
-    $french_node_alias = drupal_lookup_path('alias', 'node/' . $french_node->nid, $french_node->langcode);
+    $french_node_alias = drupal_container()->get('path.alias_manager')->getPathAlias('node/' . $french_node->nid, $french_node->langcode);
     $this->assertEqual($french_node_alias, $french_alias, 'Alias is the same.');
   }
 }
diff --git a/core/modules/path/path.admin.inc b/core/modules/path/path.admin.inc
index 32c5e4d510209c1c672c23137e4594c7ad860aa4..8c87dee0f55acdbfe67987a09482a430db13a87e 100644
--- a/core/modules/path/path.admin.inc
+++ b/core/modules/path/path.admin.inc
@@ -75,7 +75,7 @@ function path_admin_overview($keys = NULL) {
 
     // If the system path maps to a different URL alias, highlight this table
     // row to let the user know of old aliases.
-    if ($data->alias != drupal_get_path_alias($data->source, $data->langcode)) {
+    if ($data->alias != drupal_container()->get('path.alias_manager')->getPathAlias($data->source, $data->langcode)) {
       $row['class'] = array('warning');
     }
 
@@ -217,7 +217,7 @@ function path_admin_form_delete_submit($form, &$form_state) {
  */
 function path_admin_form_validate($form, &$form_state) {
   $source = &$form_state['values']['source'];
-  $source = drupal_get_normal_path($source);
+  $source = drupal_container()->get('path.alias_manager')->getSystemPath($source);
   $alias = $form_state['values']['alias'];
   $pid = isset($form_state['values']['pid']) ? $form_state['values']['pid'] : 0;
   // Language is only set if language.module is enabled, otherwise save for all
@@ -249,7 +249,15 @@ function path_admin_form_submit($form, &$form_state) {
   // Remove unnecessary values.
   form_state_values_clean($form_state);
 
-  path_save($form_state['values']);
+  $pid = isset($form_state['values']['pid']) ? $form_state['values']['pid'] : 0;
+  $source = &$form_state['values']['source'];
+  $source = drupal_container()->get('path.alias_manager')->getSystemPath($source);
+  $alias = $form_state['values']['alias'];
+  // Language is only set if language.module is enabled, otherwise save for all
+  // languages.
+  $langcode = isset($form_state['values']['langcode']) ? $form_state['values']['langcode'] : LANGUAGE_NOT_SPECIFIED;
+
+  drupal_container()->get('path.crud')->save($source, $alias, $langcode, $pid);
 
   drupal_set_message(t('The alias has been saved.'));
   $form_state['redirect'] = 'admin/config/search/path';
@@ -281,7 +289,7 @@ function path_admin_delete_confirm($form, &$form_state, $path) {
  */
 function path_admin_delete_confirm_submit($form, &$form_state) {
   if ($form_state['values']['confirm']) {
-    path_delete($form_state['path']['pid']);
+    drupal_container()->get('path.crud')->delete(array('pid' => $form_state['path']['pid']));
     $form_state['redirect'] = 'admin/config/search/path';
   }
 }
diff --git a/core/modules/path/path.api.php b/core/modules/path/path.api.php
index f2c5ecef745e02680c7344979eb924c1302c12c7..c69b97d1fc7278ac7a4fef4f9946d871bd1bc677 100644
--- a/core/modules/path/path.api.php
+++ b/core/modules/path/path.api.php
@@ -20,7 +20,7 @@
  *   - pid: Unique path alias identifier.
  *   - langcode: The language code of the alias.
  *
- * @see path_save()
+ * @see \Drupal\Core\Path\Path::save()
  */
 function hook_path_insert($path) {
   db_insert('mytable')
@@ -41,7 +41,7 @@ function hook_path_insert($path) {
  *   - pid: Unique path alias identifier.
  *   - langcode: The language code of the alias.
  *
- * @see path_save()
+ * @see \Drupal\Core\Path\Path::save()
  */
 function hook_path_update($path) {
   db_update('mytable')
@@ -60,7 +60,7 @@ function hook_path_update($path) {
  *   - pid: Unique path alias identifier.
  *   - langcode: The language code of the alias.
  *
- * @see path_delete()
+ * @see \Drupal\Core\Path\Path::delete()
  */
 function hook_path_delete($path) {
   db_delete('mytable')
diff --git a/core/modules/path/path.module b/core/modules/path/path.module
index 942fbb65dfd69b1080f56b3ba3972a7fb98441ae..dcbe3be888e4eff70390a50cec277a2ef3d3c6f8 100644
--- a/core/modules/path/path.module
+++ b/core/modules/path/path.module
@@ -107,7 +107,7 @@ function path_form_node_form_alter(&$form, $form_state) {
     if ($node->langcode != LANGUAGE_NOT_SPECIFIED) {
       $conditions['langcode'] = $node->langcode;
     }
-    $path = path_load($conditions);
+    $path = drupal_container()->get('path.crud')->load($conditions);
     if ($path === FALSE) {
       $path = array();
     }
@@ -190,14 +190,13 @@ function path_form_element_validate($element, &$form_state, $complete_form) {
  */
 function path_node_insert(Node $node) {
   if (isset($node->path)) {
-    $path = $node->path;
-    $path['alias'] = trim($path['alias']);
+    $alias = trim($node->path['alias']);
     // Only save a non-empty alias.
-    if (!empty($path['alias'])) {
+    if (!empty($alias)) {
       // Ensure fields for programmatic executions.
-      $path['source'] = 'node/' . $node->nid;
-      $path['langcode'] = isset($node->langcode) ? $node->langcode : LANGUAGE_NOT_SPECIFIED;
-      path_save($path);
+      $source = 'node/' . $node->nid;
+      $langcode = isset($node->langcode) ? $node->langcode : LANGUAGE_NOT_SPECIFIED;
+      drupal_container()->get('path.crud')->save($source, $alias, $langcode);
     }
   }
 }
@@ -208,17 +207,17 @@ function path_node_insert(Node $node) {
 function path_node_update(Node $node) {
   if (isset($node->path)) {
     $path = $node->path;
-    $path['alias'] = trim($path['alias']);
+    $alias = trim($path['alias']);
     // Delete old alias if user erased it.
     if (!empty($path['pid']) && empty($path['alias'])) {
-      path_delete($path['pid']);
+      drupal_container()->get('path.crud')->delete(array('pid' => $path['pid']));
     }
     // Only save a non-empty alias.
     if (!empty($path['alias'])) {
       // Ensure fields for programmatic executions.
-      $path['source'] = 'node/' . $node->nid;
-      $path['langcode'] = isset($node->langcode) ? $node->langcode : LANGUAGE_NOT_SPECIFIED;
-      path_save($path);
+      $source = 'node/' . $node->nid;
+      $langcode = isset($node->langcode) ? $node->langcode : LANGUAGE_NOT_SPECIFIED;
+      drupal_container()->get('path.crud')->save($source, $alias, $langcode, $path['pid']);
     }
   }
 }
@@ -228,7 +227,7 @@ function path_node_update(Node $node) {
  */
 function path_node_predelete(Node $node) {
   // Delete all aliases associated with this node.
-  path_delete(array('source' => 'node/' . $node->nid));
+  drupal_container()->get('path.crud')->delete(array('source' => 'node/' . $node->nid));
 }
 
 /**
@@ -238,7 +237,7 @@ function path_form_taxonomy_term_form_alter(&$form, $form_state) {
   // Make sure this does not show up on the delete confirmation form.
   if (empty($form_state['confirm_delete'])) {
     $term = $form_state['controller']->getEntity($form_state);
-    $path = (isset($term->tid) ? path_load('taxonomy/term/' . $term->tid) : array());
+    $path = (isset($term->tid) ? drupal_container()->get('path.crud')->load(array('source' => 'taxonomy/term/' . $term->tid)) : array());
     if ($path === FALSE) {
       $path = array();
     }
@@ -279,7 +278,7 @@ function path_taxonomy_term_insert(Term $term) {
       // Ensure fields for programmatic executions.
       $path['source'] = 'taxonomy/term/' . $term->tid;
       $path['langcode'] = LANGUAGE_NOT_SPECIFIED;
-      path_save($path);
+      drupal_container()->get('path.crud')->save($path['source'], $path['alias'], $path['langcode']);
     }
   }
 }
@@ -293,14 +292,15 @@ function path_taxonomy_term_update(Term $term) {
     $path['alias'] = trim($path['alias']);
     // Delete old alias if user erased it.
     if (!empty($path['pid']) && empty($path['alias'])) {
-      path_delete($path['pid']);
+      drupal_container()->get('path.crud')->delete(array('pid' => $path['pid']));
     }
     // Only save a non-empty alias.
     if (!empty($path['alias'])) {
+      $pid = (!empty($path['pid']) ? $path['pid'] : NULL);
       // Ensure fields for programmatic executions.
       $path['source'] = 'taxonomy/term/' . $term->tid;
       $path['langcode'] = LANGUAGE_NOT_SPECIFIED;
-      path_save($path);
+      drupal_container()->get('path.crud')->save($path['source'], $path['alias'], $path['langcode'], $pid);
     }
   }
 }
@@ -310,7 +310,7 @@ function path_taxonomy_term_update(Term $term) {
  */
 function path_taxonomy_term_delete(Term $term) {
   // Delete all aliases associated with this term.
-  path_delete(array('source' => 'taxonomy/term/' . $term->tid));
+  drupal_container()->get('path.crud')->delete(array('source' => 'taxonomy/term/' . $term->tid));
 }
 
 /**
diff --git a/core/modules/search/search.module b/core/modules/search/search.module
index a32b5c30d40a9f7a49193c3aac80ddda0a9f2b55..866536ed6e30e4c66b88cdd085adc85b6d1e5111 100644
--- a/core/modules/search/search.module
+++ b/core/modules/search/search.module
@@ -643,7 +643,7 @@ function search_index($sid, $module, $text, $langcode) {
         if ($tagname == 'a') {
           // Check if link points to a node on this site
           if (preg_match($node_regexp, $value, $match)) {
-            $path = drupal_get_normal_path($match[1]);
+            $path = drupal_container()->get('path.alias_manager')->getSystemPath($match[1]);
             if (preg_match('!(?:node|book)/(?:view/)?([0-9]+)!i', $path, $match)) {
               $linknid = $match[1];
               if ($linknid > 0) {
diff --git a/core/modules/shortcut/lib/Drupal/shortcut/Tests/ShortcutLinksTest.php b/core/modules/shortcut/lib/Drupal/shortcut/Tests/ShortcutLinksTest.php
index 54eeab44de9d66a2858218f0aa875a42ed1ab841..ccf9834af4cc7d149f5b13b1a97553d22f9fe010 100644
--- a/core/modules/shortcut/lib/Drupal/shortcut/Tests/ShortcutLinksTest.php
+++ b/core/modules/shortcut/lib/Drupal/shortcut/Tests/ShortcutLinksTest.php
@@ -31,7 +31,7 @@ function testShortcutLinkAdd() {
       'source' => 'node/' . $this->node->nid,
       'alias' => $this->randomName(8),
     );
-    path_save($path);
+    drupal_container()->get('path.crud')->save($path['source'], $path['alias']);
 
     // Create some paths to test.
     $test_cases = array(
@@ -54,7 +54,7 @@ function testShortcutLinkAdd() {
       $saved_set = shortcut_set_load($set->set_name);
       $paths = $this->getShortcutInformation($saved_set, 'link_path');
       $test_path = empty($test['path']) ? '<front>' : $test['path'];
-      $this->assertTrue(in_array(drupal_get_normal_path($test_path), $paths), 'Shortcut created: '. $test['path']);
+      $this->assertTrue(in_array(drupal_container()->get('path.alias_manager')->getSystemPath($test_path), $paths), 'Shortcut created: '. $test['path']);
       $this->assertLink($title, 0, 'Shortcut link found on the page.');
     }
   }
diff --git a/core/modules/shortcut/shortcut.admin.inc b/core/modules/shortcut/shortcut.admin.inc
index e805acfc014ad6b98a6f150cb04f721ae2f5cde9..18ec1c3a8ed248d0e5dd05afb0f727aac6e93f7f 100644
--- a/core/modules/shortcut/shortcut.admin.inc
+++ b/core/modules/shortcut/shortcut.admin.inc
@@ -430,7 +430,7 @@ function _shortcut_link_form_elements($shortcut_link = NULL) {
     );
   }
   else {
-    $shortcut_link['link_path'] = ($shortcut_link['link_path'] == '<front>') ? '' : drupal_get_path_alias($shortcut_link['link_path']);
+    $shortcut_link['link_path'] = ($shortcut_link['link_path'] == '<front>') ? '' : drupal_container()->get('path.alias_manager')->getPathAlias($shortcut_link['link_path']);
   }
 
   $form['shortcut_link']['#tree'] = TRUE;
@@ -477,7 +477,7 @@ function shortcut_link_edit_validate($form, &$form_state) {
  */
 function shortcut_link_edit_submit($form, &$form_state) {
   // Normalize the path in case it is an alias.
-  $shortcut_path = drupal_get_normal_path($form_state['values']['shortcut_link']['link_path']);
+  $shortcut_path = drupal_container()->get('path.alias_manager')->getSystemPath($form_state['values']['shortcut_link']['link_path']);
   if (empty($shortcut_path)) {
     $shortcut_path = '<front>';
   }
@@ -517,7 +517,7 @@ function shortcut_link_add_submit($form, &$form_state) {
  */
 function shortcut_admin_add_link($shortcut_link, &$shortcut_set) {
   // Normalize the path in case it is an alias.
-  $shortcut_link['link_path'] = drupal_get_normal_path($shortcut_link['link_path']);
+  $shortcut_link['link_path'] = drupal_container()->get('path.alias_manager')->getSystemPath($shortcut_link['link_path']);
   if (empty($shortcut_link['link_path'])) {
     $shortcut_link['link_path'] = '<front>';
   }
diff --git a/core/modules/shortcut/shortcut.module b/core/modules/shortcut/shortcut.module
index 9bbb12a81e70d216170eae035c01f70f7da1cdc0..2a079898faf08372c4f6ce35efa8547c745d0771 100644
--- a/core/modules/shortcut/shortcut.module
+++ b/core/modules/shortcut/shortcut.module
@@ -616,7 +616,7 @@ function shortcut_set_title_exists($title) {
  */
 function shortcut_valid_link($path) {
   // Do not use URL aliases.
-  $normal_path = drupal_get_normal_path($path);
+  $normal_path = drupal_container()->get('path.alias_manager')->getSystemPath($path);
   if ($path != $normal_path) {
     $path = $normal_path;
   }
diff --git a/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php
index 7d14ca029434c23a1fa28f0d5b054ab6e1b507cc..964b16ba50d2705113b01d97a38433dd643cbd95 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php
@@ -760,6 +760,12 @@ protected function setUp() {
     variable_set('mail_system', array('default-system' => 'Drupal\Core\Mail\VariableLog'));
 
     drupal_set_time_limit($this->timeLimit);
+    // Temporary fix so that when running from run-tests.sh we don't get an
+    // empty current path which would indicate we're on the home page.
+    $path = current_path();
+    if (empty($path)) {
+      _current_path('run-tests');
+    }
     $this->setup = TRUE;
   }
 
diff --git a/core/modules/statistics/statistics.module b/core/modules/statistics/statistics.module
index db45bee615383b46a25457ec97d91e462468e013..a3599818a82fe89f8f6a5a828003d9ce4407b13e 100644
--- a/core/modules/statistics/statistics.module
+++ b/core/modules/statistics/statistics.module
@@ -388,7 +388,7 @@ function statistics_block_view($delta = '') {
  *   A string as a link, truncated to the width, linked to the given $path.
  */
 function _statistics_link($path, $width = 35) {
-  $title = drupal_get_path_alias($path);
+  $title = drupal_container()->get('path.alias_manager')->getPathAlias($path);
   $title = truncate_utf8($title, $width, FALSE, TRUE);
   return l($title, $path);
 }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php b/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php
index f52907f7ab939c6f5de6d6c58c69015ebde84930..7ce84cbf6418687e44a8d98c50f7da0e5d579aea 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php
@@ -176,7 +176,7 @@ function testHeaderSetting() {
     $this->drupalGet('common-test/query-string');
     $this->assertPattern('@<script>.+drupalSettings.+"currentPath":"common-test\\\/query-string"@s', 'currentPath is in the JS settings');
     $path = array('source' => 'common-test/query-string', 'alias' => 'common-test/currentpath-check');
-    path_save($path);
+    drupal_container()->get('path.crud')->save($path['source'], $path['alias']);
     $this->drupalGet('common-test/currentpath-check');
     $this->assertPattern('@<script>.+drupalSettings.+"currentPath":"common-test\\\/query-string"@s', 'currentPath is in the JS settings for an aliased path');
   }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php b/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..bbca543755f8845bc1aebd24a5d23d7fbd60e01f
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php
@@ -0,0 +1,165 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Path\CrudTest.
+ */
+
+namespace Drupal\system\Tests\Path;
+
+use Drupal\simpletest\UnitTestBase;
+use Drupal\Core\Database\Database;
+use Drupal\Core\KeyValueStore\KeyValueDatabaseFactory;
+use Drupal\Core\Path\Path;
+use Drupal\Core\Path\AliasManager;
+
+/**
+ * Tests path alias CRUD and lookup functionality.
+ */
+class AliasTest extends UnitTestBase {
+
+  public static function getInfo() {
+    return array(
+      'name' => t('Path Alias Unit Tests'),
+      'description' => t('Tests path alias CRUD and lookup functionality.'),
+      'group' => t('Path API'),
+    );
+  }
+
+  function __construct($test_id = NULL) {
+    parent::__construct($test_id);
+
+    $this->fixtures = new UrlAliasFixtures();
+  }
+
+  public function tearDown() {
+    $this->fixtures->dropTables(Database::getConnection());
+
+    parent::tearDown();
+  }
+
+
+  function testCRUD() {
+    //Prepare database table.
+    $connection = Database::getConnection();
+    $this->fixtures->createTables($connection);
+
+    //Create AliasManager and Path object.
+    $aliasManager = new AliasManager($connection, new KeyValueDatabaseFactory($connection));
+    $path = new Path($connection, $aliasManager);
+
+    $aliases = $this->fixtures->sampleUrlAliases();
+
+    //Create a few aliases
+    foreach ($aliases as $idx => $alias) {
+      $path->save($alias['source'], $alias['alias'], $alias['langcode']);
+
+      $result = $connection->query('SELECT * FROM {url_alias} WHERE source = :source AND alias= :alias AND langcode = :langcode', array(':source' => $alias['source'], ':alias' => $alias['alias'], ':langcode' => $alias['langcode']));
+      $rows = $result->fetchAll();
+
+      $this->assertEqual(count($rows), 1, format_string('Created an entry for %alias.', array('%alias' => $alias['alias'])));
+
+      //Cache the pid for further tests.
+      $aliases[$idx]['pid'] = $rows[0]->pid;
+    }
+
+    //Load a few aliases
+    foreach ($aliases as $alias) {
+      $pid = $alias['pid'];
+      $loadedAlias = $path->load(array('pid' => $pid));
+      $this->assertEqual($loadedAlias, $alias, format_string('Loaded the expected path with pid %pid.', array('%pid' => $pid)));
+    }
+
+    //Update a few aliases
+    foreach ($aliases as $alias) {
+      $path->save($alias['source'], $alias['alias'] . '_updated', $alias['langcode'], $alias['pid']);
+
+      $result = $connection->query('SELECT pid FROM {url_alias} WHERE source = :source AND alias= :alias AND langcode = :langcode', array(':source' => $alias['source'], ':alias' => $alias['alias'] . '_updated', ':langcode' => $alias['langcode']));
+      $pid = $result->fetchField();
+
+      $this->assertEqual($pid, $alias['pid'], format_string('Updated entry for pid %pid.', array('%pid' => $pid)));
+    }
+
+    //Delete a few aliases
+    foreach ($aliases as $alias) {
+      $pid = $alias['pid'];
+      $path->delete(array('pid' => $pid));
+
+      $result = $connection->query('SELECT * FROM {url_alias} WHERE pid = :pid', array(':pid' => $pid));
+      $rows = $result->fetchAll();
+
+      $this->assertEqual(count($rows), 0, format_string('Deleted entry with pid %pid.', array('%pid' => $pid)));
+    }
+  }
+
+  function testLookupPath() {
+    //Prepare database table.
+    $connection = Database::getConnection();
+    $this->fixtures->createTables($connection);
+
+    //Create AliasManager and Path object.
+    $aliasManager = new AliasManager($connection, new KeyValueDatabaseFactory($connection));
+    $pathObject = new Path($connection, $aliasManager);
+
+    // Test the situation where the source is the same for multiple aliases.
+    // Start with a language-neutral alias, which we will override.
+    $path = array(
+      'source' => "user/1",
+      'alias' => 'foo',
+    );
+
+    $pathObject->save($path['source'], $path['alias']);
+    $this->assertEqual($aliasManager->getPathAlias($path['source']), $path['alias'], 'Basic alias lookup works.');
+    $this->assertEqual($aliasManager->getSystemPath($path['alias']), $path['source'], 'Basic source lookup works.');
+
+    // Create a language specific alias for the default language (English).
+    $path = array(
+      'source' => "user/1",
+      'alias' => "users/Dries",
+      'langcode' => 'en',
+    );
+    $pathObject->save($path['source'], $path['alias'], $path['langcode']);
+    $this->assertEqual($aliasManager->getPathAlias($path['source']), $path['alias'], 'English alias overrides language-neutral alias.');
+    $this->assertEqual($aliasManager->getSystemPath($path['alias']), $path['source'], 'English source overrides language-neutral source.');
+
+    // Create a language-neutral alias for the same path, again.
+    $path = array(
+      'source' => "user/1",
+      'alias' => 'bar',
+    );
+    $pathObject->save($path['source'], $path['alias']);
+    $this->assertEqual($aliasManager->getPathAlias($path['source']), "users/Dries", 'English alias still returned after entering a language-neutral alias.');
+
+    // Create a language-specific (xx-lolspeak) alias for the same path.
+    $path = array(
+      'source' => "user/1",
+      'alias' => 'LOL',
+      'langcode' => 'xx-lolspeak',
+    );
+    $pathObject->save($path['source'], $path['alias'], $path['langcode']);
+    $this->assertEqual($aliasManager->getPathAlias($path['source']), "users/Dries", 'English alias still returned after entering a LOLspeak alias.');
+    // The LOLspeak alias should be returned if we really want LOLspeak.
+    $this->assertEqual($aliasManager->getPathAlias($path['source'], 'xx-lolspeak'), 'LOL', 'LOLspeak alias returned if we specify xx-lolspeak to the alias manager.');
+
+    // Create a new alias for this path in English, which should override the
+    // previous alias for "user/1".
+    $path = array(
+      'source' => "user/1",
+      'alias' => 'users/my-new-path',
+      'langcode' => 'en',
+    );
+    $pathObject->save($path['source'], $path['alias'], $path['langcode']);
+    $this->assertEqual($aliasManager->getPathAlias($path['source']), $path['alias'], 'Recently created English alias returned.');
+    $this->assertEqual($aliasManager->getSystemPath($path['alias']), $path['source'], 'Recently created English source returned.');
+
+    // Remove the English aliases, which should cause a fallback to the most
+    // recently created language-neutral alias, 'bar'.
+    $pathObject->delete(array('langcode' => 'en'));
+    $this->assertEqual($aliasManager->getPathAlias($path['source']), 'bar', 'Path lookup falls back to recently created language-neutral alias.');
+
+    // Test the situation where the alias and language are the same, but
+    // the source differs. The newer alias record should be returned.
+    $pathObject->save('user/2', 'bar');
+    $this->assertEqual($aliasManager->getSystemPath('bar'), 'user/2', 'Newer alias record is returned when comparing two LANGUAGE_NOT_SPECIFIED paths with the same alias.');
+  }
+}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Path/LookupTest.php b/core/modules/system/lib/Drupal/system/Tests/Path/LookupTest.php
deleted file mode 100644
index e319b9459b04840737d8c42ea81f33881c338d9c..0000000000000000000000000000000000000000
--- a/core/modules/system/lib/Drupal/system/Tests/Path/LookupTest.php
+++ /dev/null
@@ -1,100 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Path\LookupTest.
- */
-
-namespace Drupal\system\Tests\Path;
-
-use Drupal\simpletest\WebTestBase;
-
-/**
- * Unit test for drupal_lookup_path().
- */
-class LookupTest extends WebTestBase {
-  public static function getInfo() {
-    return array(
-      'name' => t('Path lookup'),
-      'description' => t('Tests that drupal_lookup_path() returns correct paths.'),
-      'group' => t('Path API'),
-    );
-  }
-
-  /**
-   * Test that drupal_lookup_path() returns the correct path.
-   */
-  function testDrupalLookupPath() {
-    $account = $this->drupalCreateUser();
-    $uid = $account->uid;
-    $name = $account->name;
-
-    // Test the situation where the source is the same for multiple aliases.
-    // Start with a language-neutral alias, which we will override.
-    $path = array(
-      'source' => "user/$uid",
-      'alias' => 'foo',
-    );
-    path_save($path);
-    $this->assertEqual(drupal_lookup_path('alias', $path['source']), $path['alias'], 'Basic alias lookup works.');
-    $this->assertEqual(drupal_lookup_path('source', $path['alias']), $path['source'], 'Basic source lookup works.');
-
-    // Create a language specific alias for the default language (English).
-    $path = array(
-      'source' => "user/$uid",
-      'alias' => "users/$name",
-      'langcode' => 'en',
-    );
-    path_save($path);
-    $this->assertEqual(drupal_lookup_path('alias', $path['source']), $path['alias'], 'English alias overrides language-neutral alias.');
-    $this->assertEqual(drupal_lookup_path('source', $path['alias']), $path['source'], 'English source overrides language-neutral source.');
-
-    // Create a language-neutral alias for the same path, again.
-    $path = array(
-      'source' => "user/$uid",
-      'alias' => 'bar',
-    );
-    path_save($path);
-    $this->assertEqual(drupal_lookup_path('alias', $path['source']), "users/$name", 'English alias still returned after entering a language-neutral alias.');
-
-    // Create a language-specific (xx-lolspeak) alias for the same path.
-    $path = array(
-      'source' => "user/$uid",
-      'alias' => 'LOL',
-      'langcode' => 'xx-lolspeak',
-    );
-    path_save($path);
-    $this->assertEqual(drupal_lookup_path('alias', $path['source']), "users/$name", 'English alias still returned after entering a LOLspeak alias.');
-    // The LOLspeak alias should be returned if we really want LOLspeak.
-    $this->assertEqual(drupal_lookup_path('alias', $path['source'], 'xx-lolspeak'), 'LOL', 'LOLspeak alias returned if we specify xx-lolspeak to drupal_lookup_path().');
-
-    // Create a new alias for this path in English, which should override the
-    // previous alias for "user/$uid".
-    $path = array(
-      'source' => "user/$uid",
-      'alias' => 'users/my-new-path',
-      'langcode' => 'en',
-    );
-    path_save($path);
-    $this->assertEqual(drupal_lookup_path('alias', $path['source']), $path['alias'], 'Recently created English alias returned.');
-    $this->assertEqual(drupal_lookup_path('source', $path['alias']), $path['source'], 'Recently created English source returned.');
-
-    // Remove the English aliases, which should cause a fallback to the most
-    // recently created language-neutral alias, 'bar'.
-    db_delete('url_alias')
-      ->condition('langcode', 'en')
-      ->execute();
-    drupal_clear_path_cache();
-    $this->assertEqual(drupal_lookup_path('alias', $path['source']), 'bar', 'Path lookup falls back to recently created language-neutral alias.');
-
-    // Test the situation where the alias and language are the same, but
-    // the source differs. The newer alias record should be returned.
-    $account2 = $this->drupalCreateUser();
-    $path = array(
-      'source' => 'user/' . $account2->uid,
-      'alias' => 'bar',
-    );
-    path_save($path);
-    $this->assertEqual(drupal_lookup_path('source', $path['alias']), $path['source'], 'Newer alias record is returned when comparing two LANGUAGE_NOT_SPECIFIED paths with the same alias.');
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Path/SaveTest.php b/core/modules/system/lib/Drupal/system/Tests/Path/SaveTest.php
deleted file mode 100644
index b95893a233276e7a9ffefa3accf3f77349a58fc2..0000000000000000000000000000000000000000
--- a/core/modules/system/lib/Drupal/system/Tests/Path/SaveTest.php
+++ /dev/null
@@ -1,63 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Path\SaveTest.
- */
-
-namespace Drupal\system\Tests\Path;
-
-use Drupal\simpletest\WebTestBase;
-
-/**
- * Tests the path_save() function.
- */
-class SaveTest extends WebTestBase {
-
-  /**
-   * Enable a helper module that implements hook_path_update().
-   *
-   * @var array
-   */
-  public static $modules = array('path_test');
-
-  public static function getInfo() {
-    return array(
-      'name' => t('Path save'),
-      'description' => t('Tests that path_save() exposes the previous alias value.'),
-      'group' => t('Path API'),
-    );
-  }
-
-  function setUp() {
-    parent::setUp();
-    path_test_reset();
-  }
-
-  /**
-   * Tests that path_save() makes the original path available to modules.
-   */
-  function testDrupalSaveOriginalPath() {
-    $account = $this->drupalCreateUser();
-    $uid = $account->uid;
-    $name = $account->name;
-
-    // Create a language-neutral alias.
-    $path = array(
-      'source' => "user/$uid",
-      'alias' => 'foo',
-    );
-    $path_original = $path;
-    path_save($path);
-
-    // Alter the path.
-    $path['alias'] = 'bar';
-    path_save($path);
-
-    // Test to see if the original alias is available to modules during
-    // hook_path_update().
-    $results = variable_get('path_test_results', array());
-    $this->assertIdentical($results['hook_path_update']['original']['alias'], $path_original['alias'], 'Old path alias available to modules during hook_path_update.');
-    $this->assertIdentical($results['hook_path_update']['original']['source'], $path_original['source'], 'Old path alias available to modules during hook_path_update.');
-  }
-}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Path/UrlAliasFixtures.php b/core/modules/system/lib/Drupal/system/Tests/Path/UrlAliasFixtures.php
new file mode 100644
index 0000000000000000000000000000000000000000..6fb02da4992743363c9fd099a6a17fd41f0e0554
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Path/UrlAliasFixtures.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace Drupal\system\Tests\Path;
+
+use Drupal\Core\Database\Connection;
+
+/**
+ * Utility methods to generate sample data, database configuration, etc.
+ */
+class UrlAliasFixtures {
+
+  /**
+   * Create the tables required for the sample data.
+   *
+   * @param Drupal\Core\Database\Connection $connection
+   *   The connection to use to create the tables.
+   */
+  public function createTables(Connection $connection) {
+    $tables = $this->urlAliasTableDefinition();
+    $schema = $connection->schema();
+
+    foreach ($tables as $name => $table) {
+      $schema->dropTable($name);
+      $schema->createTable($name, $table);
+    }
+  }
+
+  /**
+   * Drop the tables used for the sample data.
+   *
+   * @param Drupal\Core\Database\Connection $connection
+   *   The connection to use to drop the tables.
+   */
+  public function dropTables(Connection $connection) {
+    $tables = $this->urlAliasTableDefinition();
+    $schema = $connection->schema();
+
+    foreach ($tables as $name => $table) {
+      $schema->dropTable($name);
+    }
+  }
+
+  /**
+   * Returns an array of URL aliases for testing.
+   *
+   * @return array of URL alias definitions.
+   */
+  public function sampleUrlAliases() {
+    return array(
+      array(
+        'source' => 'node/1',
+        'alias' => 'alias_for_node_1_en',
+        'langcode' => 'en'
+      ),
+      array(
+        'source' => 'node/2',
+        'alias' => 'alias_for_node_2_en',
+        'langcode' => 'en'
+      ),
+      array(
+        'source' => 'node/1',
+        'alias' => 'alias_for_node_1_fr',
+        'langcode' => 'fr'
+      ),
+      array(
+        'source' => 'node/1',
+        'alias' => 'alias_for_node_1_und',
+        'langcode' => 'und'
+      )
+    );
+  }
+
+
+  /**
+   * Returns the table definition for the URL alias fixtures.
+   *
+   * @return array
+   *   Table definitions.
+   */
+  public function urlAliasTableDefinition() {
+    $tables = array();
+
+    module_load_install('system');
+    $schema = system_schema();
+
+    $tables['url_alias'] = $schema['url_alias'];
+    $tables['key_value'] = $schema['key_value'];
+
+    return $tables;
+  }
+}
diff --git a/core/modules/system/lib/Drupal/system/Tests/Path/UrlAlterFunctionalTest.php b/core/modules/system/lib/Drupal/system/Tests/Path/UrlAlterFunctionalTest.php
index 72091e514a46adae459154518d59153384044c7c..353ba1897adc32d917ae8e3259cf7cf8fac5b714 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Path/UrlAlterFunctionalTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Path/UrlAlterFunctionalTest.php
@@ -40,41 +40,43 @@ function testUrlAlter() {
     $name = $account->name;
 
     // Test a single altered path.
-    $this->assertUrlInboundAlter("user/$name", "user/$uid");
+    $this->drupalGet("user/$name");
+    $this->assertResponse('200', 'The user/username path gets resolved correctly');
     $this->assertUrlOutboundAlter("user/$uid", "user/$name");
 
     // Test that a path always uses its alias.
     $path = array('source' => "user/$uid/test1", 'alias' => 'alias/test1');
-    path_save($path);
+    drupal_container()->get('path.crud')->save($path['source'], $path['alias']);
     $this->assertUrlInboundAlter('alias/test1', "user/$uid/test1");
     $this->assertUrlOutboundAlter("user/$uid/test1", 'alias/test1');
 
-    // Test that alias source paths are normalized in the interface.
-    $edit = array('source' => "user/$name/edit", 'alias' => 'alias/test2');
+    // Test adding an alias via the UI.
+    $edit = array('source' => "user/$uid/edit", 'alias' => 'alias/test2');
     $this->drupalPost('admin/config/search/path/add', $edit, t('Save'));
     $this->assertText(t('The alias has been saved.'));
-
-    // Test that a path always uses its alias.
-    $this->assertUrlInboundAlter('alias/test2', "user/$uid/edit");
+    $this->drupalGet('alias/test2');
+    $this->assertResponse('200', 'The path alias gets resolved correctly');
     $this->assertUrlOutboundAlter("user/$uid/edit", 'alias/test2');
 
     // Test a non-existent user is not altered.
     $uid++;
-    $this->assertUrlInboundAlter("user/$uid", "user/$uid");
     $this->assertUrlOutboundAlter("user/$uid", "user/$uid");
 
     // Test that 'forum' is altered to 'community' correctly, both at the root
     // level and for a specific existing forum.
-    $this->assertUrlInboundAlter('community', 'forum');
+    $this->drupalGet('community');
+    $this->assertText('General discussion', 'The community path gets resolved correctly');
     $this->assertUrlOutboundAlter('forum', 'community');
     $forum_vid = config('forum.settings')->get('vocabulary');
+    $term_name = $this->randomName();
     $tid = db_insert('taxonomy_term_data')
       ->fields(array(
-        'name' => $this->randomName(),
+        'name' => $term_name,
         'vid' => $forum_vid,
       ))
       ->execute();
-    $this->assertUrlInboundAlter("community/$tid", "forum/$tid");
+    $this->drupalGet("community/$tid");
+    $this->assertText($term_name, 'The community/{tid} path gets resolved correctly');
     $this->assertUrlOutboundAlter("forum/$tid", "community/$tid");
   }
 
@@ -87,14 +89,6 @@ function testCurrentUrlRequestedPath() {
     $this->assertRaw('current_path=url-alter-test/foo', 'current_path() returns the internal path.');
   }
 
-  /**
-   * Tests that current_path() is initialized when the request path is empty.
-   */
-  function testGetQInitialized() {
-    $this->drupalGet('');
-    $this->assertText("current_path() is non-empty with an empty request path.", 'current_path() is initialized with an empty request path.');
-  }
-
   /**
    * Assert that an outbound path is altered to an expected value.
    *
@@ -118,7 +112,7 @@ protected function assertUrlOutboundAlter($original, $final) {
    *
    * @param $original
    *   A string with the aliased or un-normal path that is run through
-   *   drupal_get_normal_path().
+   *   drupal_container()->get('path.alias_manager')->getSystemPath().
    * @param $final
    *   A string with the expected result after url().
    * @return
@@ -126,7 +120,7 @@ protected function assertUrlOutboundAlter($original, $final) {
    */
   protected function assertUrlInboundAlter($original, $final) {
     // Test inbound altering.
-    $result = drupal_get_normal_path($original);
+    $result = drupal_container()->get('path.alias_manager')->getSystemPath($original);
     $this->assertIdentical($result, $final, format_string('Altered inbound URL %original, expected %final, and got %result.', array('%original' => $original, '%final' => $final, '%result' => $result)));
   }
 }
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index 3a07fa2fee447159b7909f1dbf4fd5fec78ef169..25691bd692abf8fcb208a3f8e6f1c68b7abfc2d3 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -1410,10 +1410,11 @@ function system_site_information_settings($form, &$form_state) {
     '#type' => 'fieldset',
     '#title' => t('Front page'),
   );
+  $front_page = $site_config->get('page.front') != 'user' ? drupal_container()->get('path.alias_manager')->getPathAlias($site_config->get('page.front')) : '';
   $form['front_page']['site_frontpage'] = array(
     '#type' => 'textfield',
     '#title' => t('Default front page'),
-    '#default_value' => ($site_config->get('page.front') != 'user' ? drupal_get_path_alias($site_config->get('page.front')) : ''),
+    '#default_value' => $front_page,
     '#size' => 40,
     '#description' => t('Optionally, specify a relative URL to display as the front page. Leave blank to display the default front page.'),
     '#field_prefix' => url(NULL, array('absolute' => TRUE)),
@@ -1455,7 +1456,7 @@ function system_site_information_settings_validate($form, &$form_state) {
   }
   else {
     // Get the normal path of the front page.
-    form_set_value($form['front_page']['site_frontpage'], drupal_get_normal_path($form_state['values']['site_frontpage']), $form_state);
+    form_set_value($form['front_page']['site_frontpage'], drupal_container()->get('path.alias_manager')->getSystemPath($form_state['values']['site_frontpage']), $form_state);
   }
   // Validate front page path.
   if (!drupal_valid_path($form_state['values']['site_frontpage'])) {
@@ -1463,10 +1464,10 @@ function system_site_information_settings_validate($form, &$form_state) {
   }
   // Get the normal paths of both error pages.
   if (!empty($form_state['values']['site_403'])) {
-    form_set_value($form['error_page']['site_403'], drupal_get_normal_path($form_state['values']['site_403']), $form_state);
+    form_set_value($form['error_page']['site_403'], drupal_container()->get('path.alias_manager')->getSystemPath($form_state['values']['site_403']), $form_state);
   }
   if (!empty($form_state['values']['site_404'])) {
-    form_set_value($form['error_page']['site_404'], drupal_get_normal_path($form_state['values']['site_404']), $form_state);
+    form_set_value($form['error_page']['site_404'], drupal_container()->get('path.alias_manager')->getSystemPath($form_state['values']['site_404']), $form_state);
   }
   // Validate 403 error path.
   if (!empty($form_state['values']['site_403']) && !drupal_valid_path($form_state['values']['site_403'])) {
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index e9c086086e73caca533de1de673b6d5795bfb79b..239d3a27dd9c108f0fa8840cf42e345309f583b7 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -3476,7 +3476,7 @@ function hook_system_themes_page_alter(&$theme_groups) {
  * @param $path_language
  *   The language of the path.
  *
- * @see drupal_get_normal_path()
+ * @see \Drupal\Core\Path\AliasManager::getSystemPath()
  */
 function hook_url_inbound_alter(&$path, $original_path, $path_language) {
   // Create the path user/me/edit, which allows a user to edit their account.
diff --git a/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathSubscriber.php b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathSubscriber.php
new file mode 100644
index 0000000000000000000000000000000000000000..3f4f728a91aeabfe81136fa674b41858e2ecaaaa
--- /dev/null
+++ b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathSubscriber.php
@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\url_alter_test\PathSubscriber.
+ */
+
+namespace Drupal\url_alter_test;
+
+use Drupal\Core\EventSubscriber\PathListenerBase;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Path subscriber for url_alter_test.
+ */
+class PathSubscriber extends PathListenerBase implements EventSubscriberInterface {
+
+  /**
+   * Resolve the system path based on some arbitrary rules.
+   *
+   * @param Symfony\Component\HttpKernel\Event\GetResponseEvent $event
+   *   The Event to process.
+   */
+  public function onKernelRequestPathResolve(GetResponseEvent $event) {
+    $request = $event->getRequest();
+    $path = $this->extractPath($request);
+    // Rewrite user/username to user/uid.
+    if (preg_match('!^user/([^/]+)(/.*)?!', $path, $matches)) {
+      if ($account = user_load_by_name($matches[1])) {
+        $matches += array(2 => '');
+        $path = 'user/' . $account->uid . $matches[2];
+      }
+    }
+
+    // Rewrite community/ to forum/.
+    if ($path == 'community' || strpos($path, 'community/') === 0) {
+      $path = 'forum' . substr($path, 9);
+    }
+
+    if ($path == 'url-alter-test/bar') {
+      $path = 'url-alter-test/foo';
+    }
+
+    $this->setPath($request, $path);
+  }
+
+  /**
+   * Registers the methods in this class that should be listeners.
+   *
+   * @return array
+   *   An array of event listener definitions.
+   */
+  static function getSubscribedEvents() {
+    $events[KernelEvents::REQUEST][] = array('onKernelRequestPathResolve', 100);
+    return $events;
+  }
+}
diff --git a/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/UrlAlterTestBundle.php b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/UrlAlterTestBundle.php
new file mode 100644
index 0000000000000000000000000000000000000000..cd028e8deadd162646ddecdfe9f43ca1b5c117a4
--- /dev/null
+++ b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/UrlAlterTestBundle.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\url_alter_test\UrlAlterTestBundle.
+ */
+
+namespace Drupal\url_alter_test;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+/**
+ * Test bundle class for url_alter_test.
+ *
+ * Used to register an event subscriber that resolves a path alias to a system
+ * path based on an arbitrary set of rules.
+ *
+ * @see \Drupal\url_alter_test\PathSubscriber
+ */
+class UrlAlterTestBundle extends Bundle
+{
+  public function build(ContainerBuilder $container) {
+    $container->register('url_alter_test.path_subscriber', 'Drupal\url_alter_test\PathSubscriber')
+      ->addTag('event_subscriber');
+  }
+}
diff --git a/core/modules/system/tests/modules/url_alter_test/url_alter_test.module b/core/modules/system/tests/modules/url_alter_test/url_alter_test.module
index a5ca13deb4c67c8e3a156a955092b5fb4a87f821..61cc625a79070a852932757eb73fa3a12acfa159 100644
--- a/core/modules/system/tests/modules/url_alter_test/url_alter_test.module
+++ b/core/modules/system/tests/modules/url_alter_test/url_alter_test.module
@@ -26,32 +26,6 @@ function url_alter_test_foo() {
   exit;
 }
 
-/**
- * Implements hook_url_inbound_alter().
- */
-function url_alter_test_url_inbound_alter(&$path, $original_path, $path_language) {
-  if (!request_path() && current_path()) {
-    drupal_set_message("current_path() is non-empty with an empty request path.");
-  }
-
-  // Rewrite user/username to user/uid.
-  if (preg_match('!^user/([^/]+)(/.*)?!', $path, $matches)) {
-    if ($account = user_load_by_name($matches[1])) {
-      $matches += array(2 => '');
-      $path = 'user/' . $account->uid . $matches[2];
-    }
-  }
-
-  // Rewrite community/ to forum/.
-  if ($path == 'community' || strpos($path, 'community/') === 0) {
-    $path = 'forum' . substr($path, 9);
-  }
-
-  if ($path == 'url-alter-test/bar') {
-    $path = 'url-alter-test/foo';
-  }
-}
-
 /**
  * Implements hook_url_outbound_alter().
  */
diff --git a/core/modules/views/views_ui/views_ui.module b/core/modules/views/views_ui/views_ui.module
index b7040acda179a3687736f08b384137ccc449f296..9a814d53c04516681d59efb7261fd69fd5d6e07c 100644
--- a/core/modules/views/views_ui/views_ui.module
+++ b/core/modules/views/views_ui/views_ui.module
@@ -718,7 +718,7 @@ function views_ui_views_analyze($view) {
       continue;
     }
     if ($display->hasPath() && $path = $display->getOption('path')) {
-      $normal_path = drupal_get_normal_path($path);
+      $normal_path = drupal_container()->get('path.alias_manager')->getSystemPath($path);
       if ($path != $normal_path) {
         $ret[] = Analyzer::formatMessage(t('You have configured display %display with a path which is an path alias as well. This might lead to unwanted effects so better use an internal path.', array('%display' => $display['display_title'])), 'warning');
       }
diff --git a/core/scripts/generate-d7-content.sh b/core/scripts/generate-d7-content.sh
index acfc1a3168de82e9c99bb7ecaf9ffc638640f89f..5f03ab2209a58a836f451b4411a30a69a89d1a3f 100644
--- a/core/scripts/generate-d7-content.sh
+++ b/core/scripts/generate-d7-content.sh
@@ -252,7 +252,7 @@
     'alias' => "content/poll/$i/results",
     'source' => "node/$node->nid/results",
   );
-  path_save($path);
+  drupal_container()->get('path.crud')->save($path['source'], $path['alias']);
 
   // Add some votes
   $node = node_load($node->nid);