Make GetRootWindow() return a Window instead of a RootWindow.

chrome/browser/ui/views/desktop_media_picker_views.cc

 // 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.
 
 #include "chrome/browser/media/desktop_media_picker.h"
 
 #include "ash/shell.h"
 #include "base/callback.h"
 #include "chrome/browser/media/desktop_media_picker_model.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 471 matching lines @@
   // TODO(sergeyu): Update this code when Ash-specific window capturer is
   // implemented. Currently this code will always get native windows ID
   // which is not what we need in Ash. http://crbug.com/295102
   content::DesktopMediaID::Id dialog_window_id;
 
 #if defined(OS_WIN)
   dialog_window_id = reinterpret_cast<content::DesktopMediaID::Id>(
       views::HWNDForWidget(GetWidget()));
 #elif defined(USE_AURA)
   dialog_window_id = static_cast<content::DesktopMediaID::Id>(
-      GetWidget()->GetNativeWindow()->GetRootWindow()->GetAcceleratedWidget());
+      GetWidget()->GetNativeWindow()->GetDispatcher()->GetAcceleratedWidget());
 #else
   dialog_window_id = 0;
   NOTIMPLEMENTED();
 #endif
 
   list_view_->StartUpdating(dialog_window_id);
 
   GetWidget()->Show();
 }
 
@@ skipping 101 matching lines @@
       base::Bind(callback_, source));
   callback_.Reset();
 }
 
 }  // namespace
 
 // static
 scoped_ptr<DesktopMediaPicker> DesktopMediaPicker::Create() {
   return scoped_ptr<DesktopMediaPicker>(new DesktopMediaPickerViews());
 }