Refactor ozone drm cursor code for mojo

ui/ozone/platform/drm/gpu/drm_thread.h

 // Copyright 2015 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 UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 64 matching lines @@
       gfx::AcceleratedWidget widget,
       const gfx::VSyncProvider::UpdateVSyncCallback& callback);
 
   void CreateWindow(gfx::AcceleratedWidget widget);
   void DestroyWindow(gfx::AcceleratedWidget widget);
   void SetWindowBounds(gfx::AcceleratedWidget widget, const gfx::Rect& bounds);
   void SetCursor(gfx::AcceleratedWidget widget,
                  const std::vector<SkBitmap>& bitmaps,
                  const gfx::Point& location,
                  int frame_delay_ms);
-  void MoveCursor(gfx::AcceleratedWidget widget, const gfx::Point& location);
+  void MoveCursor(const gfx::AcceleratedWidget& widget,
+                  const gfx::Point& location);
   void CheckOverlayCapabilities(
       gfx::AcceleratedWidget widget,
       const std::vector<OverlayCheck_Params>& overlays,
       const base::Callback<void(gfx::AcceleratedWidget,
                                 const std::vector<OverlayCheck_Params>&)>&
           callback);
   void RefreshNativeDisplays(
       const base::Callback<void(const std::vector<DisplaySnapshot_Params>&)>&
           callback);
   void ConfigureNativeDisplay(
@@ skipping 28 matching lines @@
   std::unique_ptr<ScanoutBufferGenerator> buffer_generator_;
   std::unique_ptr<ScreenManager> screen_manager_;
   std::unique_ptr<DrmGpuDisplayManager> display_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmThread);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_THREAD_H_