Add screen rotation animator lock.

ash/wallpaper/wallpaper_controller.h

 // Copyright (c) 2012 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_WALLPAPER_WALLPAPER_CONTROLLER_H_
 #define ASH_WALLPAPER_WALLPAPER_CONTROLLER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
@@ skipping 15 matching lines @@
 class TaskRunner;
 }
 
 namespace wallpaper {
 class WallpaperColorCalculator;
 class WallpaperResizer;
 }
 
 namespace ash {
 
+class ScreenRotationAnimatorLock;
 class WallpaperControllerObserver;
 
 // Controls the desktop background wallpaper:
 //   - Sets a wallpaper image and layout;
 //   - Handles display change (add/remove display, configuration change etc);
 //   - Calculates prominent color for shelf;
 //   - Move wallpaper to locked container(s) when session state is not ACTIVE to
 //     hide the user desktop and move it to unlocked container when session
 //     state is ACTIVE;
 class ASH_EXPORT WallpaperController
@@ skipping 64 matching lines @@
                                 bool compare_layouts,
                                 wallpaper::WallpaperLayout layout) const;
 
   void set_wallpaper_reload_delay_for_test(int value) {
     wallpaper_reload_delay_ = value;
   }
 
   // Opens the set wallpaper page in the browser.
   void OpenSetWallpaperPage();
 
+  // ScreenRotationAnimatorLock controllered by the ScreenRotationAnimator.
+  void SetScreenRotationAnimatorLock(ScreenRotationAnimatorLock* lock) {
+    screen_rotation_animator_lock_ = lock;
+  }
+
   // mojom::WallpaperController overrides:
   void SetWallpaperPicker(mojom::WallpaperPickerPtr picker) override;
   void SetWallpaper(const SkBitmap& wallpaper,
                     wallpaper::WallpaperLayout layout) override;
 
   // WallpaperResizerObserver:
   void OnWallpaperResized() override;
 
   // WallpaperColorCalculatorObserver:
   void OnColorCalculationComplete() override;
@@ skipping 67 matching lines @@
   gfx::Size current_max_display_size_;
 
   base::OneShotTimer timer_;
 
   int wallpaper_reload_delay_;
 
   scoped_refptr<base::TaskRunner> task_runner_;
 
   ScopedSessionObserver scoped_session_observer_;
 
+  // weak ptr.
+  ScreenRotationAnimatorLock* screen_rotation_animator_lock_;
+
   DISALLOW_COPY_AND_ASSIGN(WallpaperController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WALLPAPER_WALLPAPER_CONTROLLER_H_