12 files declare their use of DefaultFactory in Zircon Profile 8

ArchiverManager.php in core/lib/Drupal/Core/Archiver/ArchiverManager.php

Contains \Drupal\Core\Archiver\ArchiverManager.

ContainerFactory.php in core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php

Contains \Drupal\Core\Plugin\Factory\ContainerFactory.

DefaultFactoryTest.php in core/tests/Drupal/Tests/Component/Plugin/DefaultFactoryTest.php

Contains \Drupal\Tests\Component\Plugin\DefaultFactoryTest.

DefaultsTestPluginManager.php in core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php

Contains \Drupal\plugin_test\Plugin\DefaultsTestPluginManager.

EntityDisplayFormBase.php in core/modules/field_ui/src/Form/EntityDisplayFormBase.php

Contains \Drupal\field_ui\Form\EntityDisplayFormBase.

FieldTypePluginManager.php in core/lib/Drupal/Core/Field/FieldTypePluginManager.php

Contains \Drupal\Core\Field\FieldTypePluginManager.

FormatterPluginManager.php in core/lib/Drupal/Core/Field/FormatterPluginManager.php

Contains \Drupal\Core\Field\FormatterPluginManager.

ImageToolkitOperationManager.php in core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationManager.php

Contains \Drupal\Core\ImageToolkit\ImageToolkitOperationManager.

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

Contains \Drupal\migrate\Plugin\MigratePluginManager.

TestPluginManager.php in core/tests/Drupal/Tests/Core/Plugin/TestPluginManager.php

Contains \Drupal\Tests\Core\Plugin\TestPluginManager.

TestPluginManager.php in core/modules/system/tests/modules/plugin_test/src/Plugin/TestPluginManager.php

Contains \Drupal\plugin_test\Plugin\TestPluginManager.

WidgetPluginManager.php in core/lib/Drupal/Core/Field/WidgetPluginManager.php

Contains \Drupal\Core\Field\WidgetPluginManager.