Move GetRootWindowController() to root_window_controller.h

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 RootWindow;
 class Window;
 }
 
 namespace gfx {
 class Rect;
 }
 
 namespace ui {
 class Event;
-class Layer;
 }
 
 namespace ash {
 // We force at least this many DIPs for any window on the screen.
 const int kMinimumOnScreenArea = 10;
 
 namespace wm {
 
 // Convenience setters/getters for |aura::client::kRootWindowActiveWindow|.
 ASH_EXPORT void ActivateWindow(aura::Window* window);
@@ skipping 93 matching lines @@
 
 // Moves |window| to the root window where the |event| occured if it is not
 // already in the same root window. Returns true if |window| was moved.
 ASH_EXPORT bool MoveWindowToEventRoot(aura::Window* window,
                                       const ui::Event& event);
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_UTIL_H_