Implement ui_controls for aura

ui/aura/desktop.h

 // Copyright (c) 2011 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_AURA_DESKTOP_H_
 #define UI_AURA_DESKTOP_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ skipping 113 matching lines @@
   // Add/remove observer.
   void AddObserver(DesktopObserver* observer);
   void RemoveObserver(DesktopObserver* observer);
 
   // Are any mouse buttons currently down?
   bool IsMouseButtonDown() const;
 
   // Posts |native_event| to the platform's event queue.
   void PostNativeEvent(const base::NativeEvent& native_event);
 
+  // Converts |point| from the desktop's coordinate system to native screen's.
+  void ConvertPointToNativeScreen(gfx::Point* point) const;
+
   // Capture -------------------------------------------------------------------
 
   // Sets capture to the specified window.
   void SetCapture(Window* window);
 
   // If |window| has mouse capture, the current capture window is set to NULL.
   void ReleaseCapture(Window* window);
 
   // Overridden from Window:
   virtual void SetTransform(const ui::Transform& transform) OVERRIDE;
@@ skipping 79 matching lines @@
   Window* mouse_moved_handler_;
   Window* focused_window_;
   Window* touch_event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(Desktop);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_DESKTOP_H_