Window ownership -> WindowTreeHost

ui/views/widget/desktop_aura/desktop_screen_position_client.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_DESKTOP_AURA_DESKTOP_SCREEN_POSITION_CLIENT_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_POSITION_CLIENT_H_
 
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/views/views_export.h"
 
 namespace views {
 
 // Client that always offsets by the toplevel RootWindow of the passed
 // in child NativeWidgetAura.
 class VIEWS_EXPORT DesktopScreenPositionClient
     : public aura::client::ScreenPositionClient {
  public:
-  DesktopScreenPositionClient();
+  explicit DesktopScreenPositionClient(aura::Window* root_window);
   virtual ~DesktopScreenPositionClient();
 
   // 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::Window* window,
                                         gfx::Point* point) OVERRIDE;
   virtual void SetBounds(aura::Window* window,
                          const gfx::Rect& bounds,
                          const gfx::Display& display) OVERRIDE;
+
+ private:
+  aura::Window* root_window_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopScreenPositionClient);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_POSITION_CLIENT_H_