Issue #1939994 by Berdir, rlmumford: Complete conversion of nodes to the new Entity Field API.

core/lib/Drupal/Core/Entity/EntityAccessController.php

core/lib/Drupal/Core/Entity/EntityFormController.php

core/modules/book/book.module

core/modules/book/lib/Drupal/book/Tests/BookTest.php

core/modules/book/templates/book-node-export-html.html.twig

core/modules/comment/comment.module

core/modules/comment/comment.pages.inc

...ules/comment/lib/Drupal/comment/CommentFormController.php

...les/comment/lib/Drupal/comment/Tests/CommentLinksTest.php

.../entity_reference/Tests/EntityReferenceAutoCreateTest.php

...dules/field/lib/Drupal/field/Plugin/views/field/Field.php

...ld/lib/Drupal/field/Tests/Views/HandlerFieldFieldTest.php

...dules/file/lib/Drupal/file/Tests/FileFieldDisplayTest.php

.../modules/file/lib/Drupal/file/Tests/FileFieldPathTest.php

...es/file/lib/Drupal/file/Tests/FileFieldRSSContentTest.php

...ules/file/lib/Drupal/file/Tests/FileFieldRevisionTest.php

...ules/file/lib/Drupal/file/Tests/FileFieldValidateTest.php

...odules/file/lib/Drupal/file/Tests/FileFieldWidgetTest.php

core/modules/file/lib/Drupal/file/Tests/FileListingTest.php

core/modules/file/lib/Drupal/file/Tests/FilePrivateTest.php