7 files declare their use of ElementInfoManagerInterface in Drupal 8

AjaxRenderer.php in core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php

AjaxRendererTest.php in core/tests/Drupal/Tests/Core/Controller/AjaxRendererTest.php

FileUploadForm.php in core/modules/media_library/src/Form/FileUploadForm.php

FileWidget.php in core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php

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

ImageWidget.php in core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php

ViewEditForm.php in core/modules/views_ui/src/ViewEditForm.php