20 files declare their use of DefaultFactory

AggregatorPluginManager.php in drupal/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginManager.php
Contains \Drupal\aggregator\Plugin\AggregatorPluginManager.
ArchiverManager.php in drupal/core/lib/Drupal/Core/Archiver/ArchiverManager.php
BlockManager.php in drupal/core/modules/block/lib/Drupal/block/Plugin/Type/BlockManager.php
CKEditorPluginManager.php in drupal/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php
Contains \Drupal\ckeditor\CKEditorPluginManager.
ConditionManager.php in drupal/core/lib/Drupal/Core/Condition/ConditionManager.php
Contains \Drupal\Core\Condition\ConditionManager.
ConstraintManager.php in drupal/core/lib/Drupal/Core/Validation/ConstraintManager.php
Contains \Drupal\Core\Validation\ConstraintManager.
ContainerFactory.php in drupal/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php
Contains \Drupal\Core\Plugin\Factory\ContainerFactory.
DefaultsTestPluginManager.php in drupal/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/DefaultsTestPluginManager.php
Contains Drupal\plugin_test\Plugin\DefaultsTestPluginManager.
EditorManager.php in drupal/core/modules/editor/lib/Drupal/editor/Plugin/EditorManager.php
Contains \Drupal\editor\Plugin\InPlaceEditorManager.
EntityManager.php in drupal/core/lib/Drupal/Core/Entity/EntityManager.php
Contains \Drupal\Core\Entity\EntityManager.
FilterPluginManager.php in drupal/core/modules/filter/lib/Drupal/filter/FilterPluginManager.php
Contains \Drupal\filter\FilterPluginManager.
FormatterPluginManager.php in drupal/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterPluginManager.php
Definition of Drupal\field\Plugin\Type\Formatter\FormatterPluginManager..
ImageToolkitManager.php in drupal/core/modules/system/lib/Drupal/system/Plugin/ImageToolkitManager.php
Contains \Drupal\system\Plugin\ImageToolkitManager.
InPlaceEditorManager.php in drupal/core/modules/edit/lib/Drupal/edit/Plugin/InPlaceEditorManager.php
Contains \Drupal\edit\Plugin\InPlaceEditorManager.
PluginUIManager.php in drupal/core/modules/system/lib/Drupal/system/Plugin/Type/PluginUIManager.php
Contains \Drupal\system\Plugin\Type\PluginUIManager.
TestPluginManager.php in drupal/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/TestPluginManager.php
Definition of Drupal\plugin_test\Plugin\TestPluginManager.
TipPluginManager.php in drupal/core/modules/tour/lib/Drupal/tour/TipPluginManager.php
Contains \Drupal\tour\TipPluginManager.
TypedDataFactory.php in drupal/core/lib/Drupal/Core/TypedData/TypedDataFactory.php
Contains \Drupal\Core\TypedData\TypedDataFactory.
ViewsPluginManager.php in drupal/core/modules/views/lib/Drupal/views/Plugin/ViewsPluginManager.php
Contains \Drupal\views\Plugin\ViewsPluginManager.
WidgetFactory.php in drupal/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetFactory.php
Definition of Drupal\field\Plugin\WidgetFactory.