mash: Migrate some misc ShelfLayoutManager deps to ash common.

ash/wm/window_animations.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_WM_WINDOW_ANIMATIONS_H_
 #define ASH_WM_WINDOW_ANIMATIONS_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ui/gfx/animation/tween.h"
 #include "ui/gfx/transform.h"
 #include "ui/wm/core/window_animations.h"
 
 namespace aura {
 class Window;
 }
+
 namespace ui {
 class Layer;
 class LayerTreeOwner;
 }
-namespace views {}
 
 // This is only for animations specific to Ash. For window animations shared
 // with desktop Chrome, see ui/views/corewm/window_animations.h.
 namespace ash {
 
 // Direction for ash-specific window animations used in workspaces and
 // lock/unlock animations.
 enum LayerScaleAnimationDirection {
   LAYER_SCALE_ANIMATION_ABOVE,
   LAYER_SCALE_ANIMATION_BELOW,
@@ skipping 28 matching lines @@
 
 // Returns the approximate bounds to which |window| will be animated when it
 // is minimized. The bounds are approximate because the minimize animation
 // involves rotation.
 ASH_EXPORT gfx::Rect GetMinimizeAnimationTargetBoundsInScreen(
     aura::Window* window);
 
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_ANIMATIONS_H_