There are currently 32 references in flutter/test/widgets that make use of TestWindow properties, these should be updated to use TestFlutterView and TestPlatformDispatcher as appropriate for the use cases.

• default_colors_test.dart has 1 reference
• editable_text_test.dart has 8 references
• heroes_test.dart has 2 references
• independent_widget_layout_test.dart has 2 references
• interactive_viewer_test.dart has 2 references
• page_view_test.dart has 1 reference
• platform_view_test.dart has 4 references
• scrollbar_test.dart has 6 references
• selectable_region_test.dart has 2 references
• snapshot_widget_test.dart has 4 references