5 files declare their use of AnonymousUserSession

ActiveLinkResponseFilterTest.php in core/tests/Drupal/Tests/Core/EventSubscriber/ActiveLinkResponseFilterTest.php
AnnounceBlockTest.php in core/modules/announcements_feed/tests/src/FunctionalJavascript/AnnounceBlockTest.php
AnonymousUserSessionTest.php in core/tests/Drupal/Tests/Core/Session/AnonymousUserSessionTest.php
Cron.php in core/lib/Drupal/Core/Cron.php
UpdateKernel.php in core/lib/Drupal/Core/Update/UpdateKernel.php

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