ash: Cleanup class/struct forward declarations

ash/wm/window_util.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_UTIL_H_
 #define ASH_WM_WINDOW_UTIL_H_
 
 #include "ash/ash_export.h"
 #include "base/compiler_specific.h"
 #include "ui/base/ui_base_types.h"
 
 namespace aura {
 class Window;
 }
 
-namespace gfx {
-class Point;
-class Rect;
-class Size;
-}
-
 namespace ui {
 class Event;
 }
 
 namespace ash {
 
-class WmWindow;
-
 namespace wm {
 
 // Utility functions for window activation.
 ASH_EXPORT void ActivateWindow(aura::Window* window);
 ASH_EXPORT void DeactivateWindow(aura::Window* window);
 ASH_EXPORT bool IsActiveWindow(aura::Window* window);
 ASH_EXPORT aura::Window* GetActiveWindow();
 ASH_EXPORT bool CanActivateWindow(aura::Window* window);
 
 // Retrieves the activatable window for |window|. If |window| is activatable,
@@ skipping 19 matching lines @@
 
 // Mark the container window so that InstallSnapLayoutManagerToContainers
 // installs the SnapToPixelLayoutManager.
 ASH_EXPORT void SetSnapsChildrenToPhysicalPixelBoundary(
     aura::Window* container);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_UTIL_H_