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

chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc

 // Copyright (c) 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/ui/ash/launcher/browser_shortcut_launcher_item_controller.h"
 
 #include <vector>
 
 #include "ash/launcher/launcher.h"
 #include "ash/launcher/launcher_model.h"
@@ skipping 224 matching lines @@
   }
 
   Activate(ash::LAUNCH_FROM_UNKNOWN);
 }
 
 string16 BrowserShortcutLauncherItemController::GetTitle() {
   return l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
 }
 
 ui::MenuModel* BrowserShortcutLauncherItemController::CreateContextMenu(
-    aura::RootWindow* root_window) {
+    aura::Window* root_window) {
   ash::LauncherItem item =
       *(launcher_controller()->model()->ItemByID(launcher_id()));
   return new LauncherContextMenu(launcher_controller(), &item, root_window);
 }
 
 ash::LauncherMenuModel*
 BrowserShortcutLauncherItemController::CreateApplicationMenu(int event_flags) {
   return new LauncherApplicationMenuItemModel(GetApplicationList(event_flags));
 }
 
@@ skipping 83 matching lines @@
   return (browser &&
           launcher_controller()->IsBrowserFromActiveUser(browser) &&
           browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH &&
           (browser->is_type_tabbed() ||
            !browser->is_app() ||
            !browser->is_type_popup() ||
            launcher_controller()->
                GetLauncherIDForAppID(web_app::GetExtensionIdFromApplicationName(
                    browser->app_name())) <= 0));
 }