[mus]Add FrameGenerator::SetHighContrastMode(bool)

services/ui/ws/platform_display_default.cc

Index: services/ui/ws/platform_display_default.cc
diff --git a/services/ui/ws/platform_display_default.cc b/services/ui/ws/platform_display_default.cc
index 43fed49ee090ad7ddb617469dd9123fafc337aa7..a126d699c0df820a8eb3ad71a2dd2ebf75ed8794 100644
--- a/services/ui/ws/platform_display_default.cc
+++ b/services/ui/ws/platform_display_default.cc
@@ -257,7 +257,7 @@ void PlatformDisplayDefault::OnAcceleratedWidgetAvailable(
           std::move(display_private),
           std::move(compositor_frame_sink_client_request));
   frame_generator_ = base::MakeUnique<FrameGenerator>(
-      this, root_window_, std::move(display_client_compositor_frame_sink));
+      root_window_, std::move(display_client_compositor_frame_sink));
   frame_generator_->SetDeviceScaleFactor(init_device_scale_factor_);
 }
 
@@ -267,9 +267,5 @@ void PlatformDisplayDefault::OnAcceleratedWidgetDestroyed() {
 
 void PlatformDisplayDefault::OnActivationChanged(bool active) {}
 
-bool PlatformDisplayDefault::IsInHighContrastMode() {
-  return delegate_ ? delegate_->IsInHighContrastMode() : false;
-}
-
 }  // namespace ws
 }  // namespace ui