Pass device scale factor from display to ws.

services/ui/ws/platform_display.h

 // Copyright 2014 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_PLATFORM_DISPLAY_H_
 #define SERVICES_UI_WS_PLATFORM_DISPLAY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 125 matching lines @@
   void SetImeVisibility(bool visible) override;
   bool IsFramePending() const override;
   void RequestCopyOfOutput(
       std::unique_ptr<cc::CopyOutputRequest> output_request) override;
   gfx::Rect GetBounds() const override;
   bool IsPrimaryDisplay() const override;
   void OnGpuChannelEstablished(
       scoped_refptr<gpu::GpuChannelHost> gpu_channel) override;
 
  private:
-  void UpdateMetrics(const gfx::Rect& bounds, float device_scale_factor);
+  void UpdateMetrics(const gfx::Rect& bounds,
+                     const gfx::Size& pixel_size,
+                     float device_scale_factor);
 
   // Update the root_location of located events to be relative to the origin
   // of this display. For example, if the origin of this display is (1800, 0)
   // and the location of the event is (100, 200) then the root_location will be
   // updated to be (1900, 200).
   void UpdateEventRootLocation(ui::LocatedEvent* event);
 
   // ui::PlatformWindowDelegate:
   void OnBoundsChanged(const gfx::Rect& new_bounds) override;
   void OnDamageRect(const gfx::Rect& damaged_region) override;
@@ skipping 26 matching lines @@
   std::unique_ptr<ui::PlatformWindow> platform_window_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultPlatformDisplay);
 };
 
 }  // namespace ws
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_PLATFORM_DISPLAY_H_