Issue #2039199 by Berdir: Convert ->uid to ->id(), isAnonymous() and isAuthenticated().

core/includes/bootstrap.inc

core/includes/common.inc

core/includes/file.inc

core/includes/form.inc

core/includes/language.inc

core/includes/session.inc

core/includes/theme.inc

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

core/lib/Drupal/Core/Session/UserSession.php

core/modules/block/block.module

core/modules/block/lib/Drupal/block/Tests/BlockTest.php

core/modules/comment/comment.module

...es/comment/lib/Drupal/comment/CommentAccessController.php

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

...comment/lib/Drupal/comment/Plugin/Core/Entity/Comment.php

...lib/Drupal/comment/Plugin/views/field/NodeNewComments.php

...dules/comment/lib/Drupal/comment/Tests/CommentCSSTest.php

...comment/lib/Drupal/comment/Tests/CommentInterfaceTest.php

.../comment/lib/Drupal/comment/Tests/CommentLanguageTest.php

...ment/lib/Drupal/comment/Tests/CommentNewIndicatorTest.php