[mus]Add FrameGenerator::SetHighContrastMode(bool)

services/ui/ws/frame_generator_delegate.h

Index: services/ui/ws/frame_generator_delegate.h
diff --git a/services/ui/ws/frame_generator_delegate.h b/services/ui/ws/frame_generator_delegate.h
deleted file mode 100644
index 03fbcd043ea533975ffcc7fb096b6d8a12981cfa..0000000000000000000000000000000000000000
--- a/services/ui/ws/frame_generator_delegate.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SERVICES_UI_WS_FRAME_GENERATOR_DELEGATE_H_
-#define SERVICES_UI_WS_FRAME_GENERATOR_DELEGATE_H_
-
-namespace ui {
-namespace ws {
-
-class FrameGeneratorDelegate {
- public:
-  virtual bool IsInHighContrastMode() = 0;
-
- protected:
-  virtual ~FrameGeneratorDelegate() {}
-};
-
-}  // namespace ws
-}  // namespace ui
-
-#endif  // SERVICES_UI_WS_FRAME_GENERATOR_DELEGATE_H_