10 files declare their use of ClassResolverInterface in Zircon Profile 8

ConstraintValidatorFactory.php in core/lib/Drupal/Core/Validation/ConstraintValidatorFactory.php

Contains \Drupal\Core\Validation\ConstraintValidatorFactory.

ControllerResolver.php in core/lib/Drupal/Core/Controller/ControllerResolver.php

Contains \Drupal\Core\Controller\ControllerResolver.

EntityResolverManager.php in core/lib/Drupal/Core/Entity/EntityResolverManager.php

Contains \Drupal\Core\Entity\EntityResolverManager.

EntityTypeManager.php in core/lib/Drupal/Core/Entity/EntityTypeManager.php

Contains \Drupal\Core\Entity\EntityTypeManager.

FormBuilder.php in core/lib/Drupal/Core/Form/FormBuilder.php

Contains \Drupal\Core\Form\FormBuilder.

HtmlFormController.php in core/lib/Drupal/Core/Controller/HtmlFormController.php

Contains \Drupal\Core\Controller\HtmlFormController.

MainContentViewSubscriber.php in core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php

Contains \Drupal\Core\EventSubscriber\MainContentViewSubscriber.

MenuLinkEditForm.php in core/modules/menu_ui/src/Form/MenuLinkEditForm.php

Contains \Drupal\menu_ui\Form\MenuLinkEditForm.

TypedDataManager.php in core/lib/Drupal/Core/TypedData/TypedDataManager.php

Contains \Drupal\Core\TypedData\TypedDataManager.

ViewsForm.php in core/modules/views/src/Form/ViewsForm.php

Contains \Drupal\views\Form\ViewsForm.