MacViews: Put wm window animation calls behind an interface.

ui/views/widget/native_widget_aura.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 UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/aura/client/focus_change_observer.h"
@@ skipping 111 matching lines @@
   void SetCursor(gfx::NativeCursor cursor) override;
   bool IsMouseEventsEnabled() const override;
   void ClearNativeFocus() override;
   gfx::Rect GetWorkAreaBoundsInScreen() const override;
   Widget::MoveLoopResult RunMoveLoop(
       const gfx::Vector2d& drag_offset,
       Widget::MoveLoopSource source,
       Widget::MoveLoopEscapeBehavior escape_behavior) override;
   void EndMoveLoop() override;
   void SetVisibilityChangedAnimationsEnabled(bool value) override;
+  Widget::VisibilityAnimation* GetVisibilityAnimation() const override;
   ui::NativeTheme* GetNativeTheme() const override;
   void OnRootViewLayout() override;
   bool IsTranslucentWindowOpacitySupported() const override;
   void OnSizeConstraintsChanged() override;
   void RepostNativeEvent(gfx::NativeEvent native_event) override;
 
   // Overridden from views::InputMethodDelegate:
   void DispatchKeyEventPostIME(const ui::KeyEvent& key) override;
 
   // Overridden from aura::WindowDelegate:
@@ skipping 74 matching lines @@
 
   scoped_ptr<TooltipManagerAura> tooltip_manager_;
 
   // Reorders child windows of |window_| associated with a view based on the
   // order of the associated views in the widget's view hierarchy.
   scoped_ptr<WindowReorderer> window_reorderer_;
 
   scoped_ptr<DropHelper> drop_helper_;
   int last_drop_operation_;
 
+  scoped_ptr<Widget::VisibilityAnimation> visibility_animation_;
+
   // The following factory is used for calls to close the NativeWidgetAura
   // instance.
   base::WeakPtrFactory<NativeWidgetAura> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_