Add second copy request after screen rotation to flatten the layers in animation.

ash/display/display_configuration_controller.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 ASH_DISPLAY_DISPLAY_CONFIGURATION_CONTROLLER_H_
 #define ASH_DISPLAY_DISPLAY_CONFIGURATION_CONTROLLER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/display/window_tree_host_manager.h"
-#include "ash/rotator/screen_rotation_animator_observer.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/display/display.h"
 
 namespace display {
 class DisplayLayout;
 class DisplayManager;
 }
 
 namespace ash {
 
 namespace test {
 class DisplayConfigurationControllerTestApi;
 }  // namespace test
 
 class DisplayAnimator;
 class ScreenRotationAnimator;
 
 // This class controls Display related configuration. Specifically it:
 // * Handles animated transitions where appropriate.
 // * Limits the frequency of certain operations.
 // * Provides a single interface for UI and API classes.
 // * TODO: Forwards display configuration changed events to UI and API classes.
 class ASH_EXPORT DisplayConfigurationController
-    : public WindowTreeHostManager::Observer,
-      public ScreenRotationAnimatorObserver {
+    : public WindowTreeHostManager::Observer {
  public:
   DisplayConfigurationController(
       display::DisplayManager* display_manager,
       WindowTreeHostManager* window_tree_host_manager);
   ~DisplayConfigurationController() override;
 
   // Sets the layout for the current displays with a fade in/out
   // animation. Currently |display_id| is assumed to be the secondary
   // display.  TODO(oshima/stevenjb): Support 3+ displays.
   void SetDisplayLayout(std::unique_ptr<display::DisplayLayout> layout);
 
   // Sets the mirror mode with a fade-in/fade-out animation. Affects all
   // displays.
   void SetMirrorMode(bool mirror);
 
   // Sets the display's rotation with animation if available.
   void SetDisplayRotation(int64_t display_id,
                           display::Display::Rotation rotation,
                           display::Display::RotationSource source);
 
   // Sets the primary display id.
   void SetPrimaryDisplayId(int64_t display_id);
 
   // WindowTreeHostManager::Observer
   void OnDisplayConfigurationChanged() override;
 
-  // ScreenRotationAnimatorObserver
-  // This will be called when the animation is ended or aborted.
-  void OnScreenRotationAnimationFinished(
-      ScreenRotationAnimator* animator) override;
-
  protected:
   friend class ash::test::DisplayConfigurationControllerTestApi;
 
   // Allow tests to skip animations.
   void ResetAnimatorForTest();
 
  private:
   class DisplayChangeLimiter;
 
   // Sets the timeout for the DisplayChangeLimiter if it exists. Call this
@@ skipping 24 matching lines @@
       rotation_animator_map_;
 
   base::WeakPtrFactory<DisplayConfigurationController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayConfigurationController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_DISPLAY_CONFIGURATION_CONTROLLER_H_