Issue #2014245 by chx: Move drupal_bootstrap_config_storage() to settings.

core/lib/Drupal/Core/Config/BootstrapConfigStorageFactory.php

@@ -6,7 +6,7 @@
  */
 
 namespace Drupal\Core\Config;
-
+use Drupal\Component\Utility\Settings;
 
 /**
  * Defines a factory for retrieving the config storage used pre-kernel.
@@ -20,8 +20,10 @@ class BootstrapConfigStorageFactory {
    *   A configuration storage implementation.
    */
   public static function get() {
-    if (isset($GLOBALS['conf']['drupal_bootstrap_config_storage'])) {
-      return call_user_func($GLOBALS['conf']['drupal_bootstrap_config_storage']);
+    $settings = Settings::getSingleton();
+    $drupal_bootstrap_config_storage = $settings->get('drupal_bootstrap_config_storage');
+    if ($drupal_bootstrap_config_storage && is_callable($drupal_bootstrap_config_storage)) {
+      return call_user_func($drupal_bootstrap_config_storage);
     }
     else {
       return new FileStorage(config_get_config_directory(CONFIG_ACTIVE_DIRECTORY));