Scale client area, hit test mask and bounds by device_scale_factor.

services/ui/demo/mus_demo.h

 // 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_DEMO_MUS_DEMO_H_
 #define SERVICES_UI_DEMO_MUS_DEMO_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "services/service_manager/public/cpp/service.h"
 #include "services/ui/public/cpp/window_manager_delegate.h"
 #include "services/ui/public/cpp/window_tree_client_delegate.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/display/screen_base.h"
 
 namespace ui {
 class BitmapUploader;
 class GpuService;
 
 namespace demo {
 
 // A simple MUS Demo service. This service connects to the service:ui, creates a
 // new window and draws a spinning square in the center of the window. Provides
 // a simple way to demonstrate that the graphic stack works as intended.
@@ skipping 40 matching lines @@
   // Allocate a bitmap the same size as the window to draw into.
   void AllocBitmap();
 
   // Draws one frame, incrementing the rotation angle.
   void DrawFrame();
 
   Window* window_ = nullptr;
   std::unique_ptr<WindowTreeClient> window_tree_client_;
   std::unique_ptr<GpuService> gpu_service_;
 
+  // Dummy screen required to be the screen instance.
+  std::unique_ptr<display::ScreenBase> screen_;
+
   // Used to send frames to mus.
   std::unique_ptr<BitmapUploader> uploader_;
 
   // Bitmap that is the same size as our client window area.
   SkBitmap bitmap_;
 
   // Timer for calling DrawFrame().
   base::RepeatingTimer timer_;
 
   // Current rotation angle for drawing.
   double angle_ = 0.0;
 
   // Last time a frame was drawn.
   base::TimeTicks last_draw_frame_time_;
 
   DISALLOW_COPY_AND_ASSIGN(MusDemo);
 };
 
 }  // namespace demo
 }  // namespace ui
 
 #endif  // SERVICES_UI_DEMO_MUS_DEMO_H_