8 files declare their use of ContainerFactory in Drupal 8

BreakpointManager.php in core/modules/breakpoint/src/BreakpointManager.php

ConfigMapperManager.php in core/modules/config_translation/src/ConfigMapperManager.php

ContextualLinkManager.php in core/lib/Drupal/Core/Menu/ContextualLinkManager.php

DefaultPluginManager.php in core/lib/Drupal/Core/Plugin/DefaultPluginManager.php

LocalActionManager.php in core/lib/Drupal/Core/Menu/LocalActionManager.php

LocalTaskManager.php in core/lib/Drupal/Core/Menu/LocalTaskManager.php

MenuLinkManager.php in core/lib/Drupal/Core/Menu/MenuLinkManager.php

MigrationPluginManager.php in core/modules/migrate/src/Plugin/MigrationPluginManager.php