Revert "chromeos: Move files in //ash/common to //ash, part 3"

ash/shelf/shelf_background_animator.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_SHELF_SHELF_BACKGROUND_ANIMATOR_H_
 #define ASH_SHELF_SHELF_BACKGROUND_ANIMATOR_H_
 
 #include <memory>
 #include <vector>
 
 #include "ash/ash_export.h"
+#include "ash/common/wallpaper/wallpaper_controller_observer.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "ash/shelf/wm_shelf_observer.h"
-#include "ash/wallpaper/wallpaper_controller_observer.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/animation/animation_delegate.h"
 
 namespace gfx {
 class SlideAnimation;
 }  // namespace gfx
 
 namespace ash {
@@ skipping 153 matching lines @@
   AnimationValues item_background_values_;
 
   base::ObserverList<ShelfBackgroundAnimatorObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfBackgroundAnimator);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_BACKGROUND_ANIMATOR_H_