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

ui/app_list/views/app_list_view.cc

 // 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.
 
 #include "ui/app_list/views/app_list_view.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/strings/string_util.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 150 matching lines @@
 // static
 void AppListView::SetNextPaintCallback(const base::Closure& callback) {
   g_next_paint_callback = callback;
 }
 
 #if defined(OS_WIN)
 HWND AppListView::GetHWND() const {
 #if defined(USE_AURA)
   gfx::NativeWindow window =
       GetWidget()->GetTopLevelWidget()->GetNativeWindow();
-  return window->GetRootWindow()->GetAcceleratedWidget();
+  return window->GetDispatcher()->GetAcceleratedWidget();
 #else
   return GetWidget()->GetTopLevelWidget()->GetNativeWindow();
 #endif
 }
 #endif
 
 void AppListView::InitAsBubbleInternal(gfx::NativeView parent,
                                        PaginationModel* pagination_model,
                                        views::BubbleBorder::Arrow arrow,
                                        bool border_accepts_events,
@@ skipping 134 matching lines @@
 
 void AppListView::OnAppListModelSigninStatusChanged() {
   OnSigninStatusChanged();
 }
 
 void AppListView::OnAppListModelUsersChanged() {
   OnSigninStatusChanged();
 }
 
 }  // namespace app_list