Make cursors work on win aura.

ui/views/widget/desktop_root_window_host_win.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_ROOT_WINDOW_HOST_WIN_H_
 #define UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_WIN_H_
 
 #include "ui/aura/root_window_host.h"
 #include "ui/views/widget/desktop_root_window_host.h"
 #include "ui/views/win/hwnd_message_handler_delegate.h"
 
 namespace aura {
 class DesktopActivationClient;
+class DesktopCursorClient;
 class DesktopDispatcherClient;
 class FocusManager;
+namespace client {
+class ScreenPositionClient;
+}
 }
 
 namespace views {
 class DesktopCaptureClient;
 class HWNDMessageHandler;
 
 class DesktopRootWindowHostWin : public DesktopRootWindowHost,
                                  public aura::RootWindowHost,
                                  public HWNDMessageHandlerDelegate {
  public:
@@ skipping 141 matching lines @@
   scoped_ptr<aura::DesktopDispatcherClient> dispatcher_client_;
   scoped_ptr<aura::FocusManager> focus_manager_;
 
   // TODO(beng): Consider providing an interface to DesktopNativeWidgetAura
   //             instead of providing this route back to Widget.
   internal::NativeWidgetDelegate* native_widget_delegate_;
 
   aura::RootWindowHostDelegate* root_window_host_delegate_;
   aura::Window* content_window_;
 
+  // In some cases, we set a screen position client on |root_window_|. If we
+  // do, we're responsible for the lifetime.
+  scoped_ptr<aura::client::ScreenPositionClient> position_client_;
+
+  // A simple cursor client which just forwards events to the RootWindow.
+  scoped_ptr<aura::DesktopCursorClient> cursor_client_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostWin);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_WIN_H_