Make aura::clients take Window instead of RootWindow

ash/display/screen_position_controller.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_DISPLAY_SCREEN_POSITION_CONTROLLER_H_
 #define ASH_DISPLAY_SCREEN_POSITION_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "ui/aura/client/screen_position_client.h"
 
 namespace ash {
 namespace internal {
 
 class ScreenPositionController : public aura::client::ScreenPositionClient {
  public:
   ScreenPositionController() {}
   virtual ~ScreenPositionController() {}
 
   // aura::client::ScreenPositionClient overrides:
   virtual void ConvertPointToScreen(const aura::Window* window,
                                     gfx::Point* point) OVERRIDE;
   virtual void ConvertPointFromScreen(const aura::Window* window,
                                       gfx::Point* point) OVERRIDE;
-  virtual void ConvertHostPointToScreen(aura::RootWindow* window,
+  virtual void ConvertHostPointToScreen(aura::Window* window,
                                         gfx::Point* point) OVERRIDE;
   virtual void SetBounds(aura::Window* window,
                          const gfx::Rect& bounds,
                          const gfx::Display& display) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenPositionController);
 };
 
 }  // internal
 }  // ash
 
 #endif  // ASH_DISPLAY_SCREEN_POSITION_CONTROLLER_H_