Move ash specific cursor code to CursorManager.

ui/aura/desktop/desktop_cursor_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_AURA_DESKTOP_DESKTOP_CURSOR_CLIENT_H_
 #define UI_AURA_DESKTOP_DESKTOP_CURSOR_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "ui/aura/aura_export.h"
 
 #include "ui/aura/client/cursor_client.h"
 
 namespace aura {
 class RootWindow;
 
 // A CursorClient that interacts with only one RootWindow. (Unlike the one in
 // ash, which interacts with all the RootWindows.)
 class AURA_EXPORT DesktopCursorClient : public client::CursorClient {
  public:
   explicit DesktopCursorClient(aura::RootWindow* window);
   virtual ~DesktopCursorClient();
 
   // Overridden from client::CursorClient:
   virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
   virtual void ShowCursor(bool show) OVERRIDE;
   virtual bool IsCursorVisible() const OVERRIDE;
+  virtual void SetDeviceScaleFactor(float scale_factor) OVERRIDE;
 
  private:
   aura::RootWindow* root_window_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopCursorClient);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_DESKTOP_DESKTOP_CURSOR_CLIENT_H_