Fixes crash introduced @ 153047 (you can hit crash by maximizing a

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 "ash/ash_export.h"
 
 namespace aura {
@@ skipping 72 matching lines @@
 
 // Returns the duration of the cross-fade animation based on the |old_bounds|
 // and |new_bounds| of the window.
 ASH_EXPORT base::TimeDelta GetCrossFadeDuration(const gfx::Rect& old_bounds,
                                                 const gfx::Rect& new_bounds);
 
 // Returns false if the |window| didn't animate.
 ASH_EXPORT bool AnimateOnChildWindowVisibilityChanged(
     aura::Window* window, bool visible);
 
-// Delay the old layer deletion so that test can verify the behavior of
-// old layer.
-ASH_EXPORT void SetDelayedOldLayerDeletionInCrossFadeForTest(bool value);
-
 }  // namespace internal
 }  // namespace ash
 
 
 #endif  // ASH_WM_WINDOW_ANIMATIONS_H_