[mus]Add FrameGenerator::SetHighContrastMode(bool)

services/ui/ws/test_utils.h

Index: services/ui/ws/test_utils.h
diff --git a/services/ui/ws/test_utils.h b/services/ui/ws/test_utils.h
index 22ddee3cbb99ade45c5e89015dca7d90d946d5fb..fe79c0f08aca8faab00bd6efaa5fc1ad95cc5c94 100644
--- a/services/ui/ws/test_utils.h
+++ b/services/ui/ws/test_utils.h
@@ -21,7 +21,6 @@
 #include "services/ui/ws/display_binding.h"
 #include "services/ui/ws/drag_controller.h"
 #include "services/ui/ws/event_dispatcher.h"
-#include "services/ui/ws/frame_generator_delegate.h"
 #include "services/ui/ws/platform_display.h"
 #include "services/ui/ws/platform_display_factory.h"
 #include "services/ui/ws/test_change_tracker.h"
@@ -289,20 +288,6 @@ class TestPlatformDisplayFactory : public PlatformDisplayFactory {
 
 // -----------------------------------------------------------------------------
 
-// A stub implementation of FrameGeneratorDelegate.
-class TestFrameGeneratorDelegate : public FrameGeneratorDelegate {
- public:
-  TestFrameGeneratorDelegate();
-  ~TestFrameGeneratorDelegate() override;
-
-  // FrameGeneratorDelegate:
-  bool IsInHighContrastMode() override;
-
-  DISALLOW_COPY_AND_ASSIGN(TestFrameGeneratorDelegate);
-};
-
-// -----------------------------------------------------------------------------
-
 class TestWindowManager : public mojom::WindowManager {
  public:
   TestWindowManager()