Make aura::clients take Window instead of RootWindow

ui/views/widget/desktop_aura/desktop_capture_client.h

 // Copyright 2013 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_CAPTURE_CLIENT_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CAPTURE_CLIENT_H_
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/views/views_export.h"
 
+namespace aura {
+class RootWindow;
+}
+
 namespace views {
 
 // Desktop implementation of CaptureClient. There is one CaptureClient per
 // DesktopNativeWidgetAura.
 class VIEWS_EXPORT DesktopCaptureClient : public aura::client::CaptureClient {
  public:
   explicit DesktopCaptureClient(aura::RootWindow* root);
   virtual ~DesktopCaptureClient();
 
   // Overridden from aura::client::CaptureClient:
   virtual void SetCapture(aura::Window* window) OVERRIDE;
   virtual void ReleaseCapture(aura::Window* window) OVERRIDE;
   virtual aura::Window* GetCaptureWindow() OVERRIDE;
 
  private:
   typedef std::set<aura::RootWindow*> Roots;
 
   aura::RootWindow* root_;
   aura::Window* capture_window_;
 
   // Set of RootWindows DesktopCaptureClient has been created for.
   static Roots* roots_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopCaptureClient);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_CAPTURE_CLIENT_H_