Replaced BackgroundAnimator with ShelfBackgroundAnimator.

ash/common/wm/background_animator.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_COMMON_WM_BACKGROUND_ANIMATOR_H_
 #define ASH_COMMON_WM_BACKGROUND_ANIMATOR_H_
 
 #include "ash/ash_export.h"
 #include "base/macros.h"
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/gfx/animation/slide_animation.h"
 
 namespace ash {
 
 // How the background can be changed.
 enum BackgroundAnimatorChangeType {
   BACKGROUND_CHANGE_ANIMATE,
   BACKGROUND_CHANGE_IMMEDIATE
 };
 
+class BackgroundAnimator;
+
 // Delegate is notified any time the background changes.
 class ASH_EXPORT BackgroundAnimatorDelegate {
  public:
-  virtual void UpdateBackground(int alpha) = 0;
+  virtual void UpdateBackground(BackgroundAnimator* animator, int alpha) = 0;
+
+  virtual void BackgroundAnimationEnded(bool successfully) {}

[James Cook, 2016/06/09 23:40:37]

nit: It feels a little weird that the other function is pure-virtual and this
one isn't.

[bruthig, 2016/06/14 16:40:44]

Done. Agreed, this was a short cut to get it up for design review.

 
  protected:
   virtual ~BackgroundAnimatorDelegate() {}
 };
 
 // BackgroundAnimator is used by the shelf to animate the background (alpha).
 class ASH_EXPORT BackgroundAnimator : public gfx::AnimationDelegate {
  public:
   BackgroundAnimator(BackgroundAnimatorDelegate* delegate,
                      int min_alpha,
@@ skipping 28 matching lines @@
 
   // Current alpha value of the background.
   int alpha_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundAnimator);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_BACKGROUND_ANIMATOR_H_