Use the default dispatcher where possible for nested message loops.

ui/views/widget/desktop_aura/desktop_dispatcher_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_DISPATCHER_CLIENT_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DISPATCHER_CLIENT_H_
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "ui/aura/client/dispatcher_client.h"
 #include "ui/views/views_export.h"
 
 namespace views {
 
 // TODO(erg): I won't lie to you; I have no idea what this is or what it does.
 class VIEWS_EXPORT DesktopDispatcherClient
     : public aura::client::DispatcherClient {
  public:
   DesktopDispatcherClient();
   virtual ~DesktopDispatcherClient();
 
   virtual void RunWithDispatcher(base::MessagePumpDispatcher* dispatcher,
                                  aura::Window* associated_window) OVERRIDE;
+  virtual void QuitNestedMessageLoop() OVERRIDE;
 
  private:
+  base::Closure quit_closure_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopDispatcherClient);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DISPATCHER_CLIENT_H_