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

chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.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/ui/ash/launcher/chrome_launcher_controller.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 198 matching lines @@
   virtual void ItemSelected(const ui::Event& event) OVERRIDE {}
   virtual string16 GetTitle() OVERRIDE { return string16(); }
   virtual ChromeLauncherAppMenuItems GetApplicationList(
       int event_flags) OVERRIDE {
     ChromeLauncherAppMenuItems items;
     items.push_back(new ChromeLauncherAppMenuItem(string16(), NULL, false));
     items.push_back(new ChromeLauncherAppMenuItem(string16(), NULL, false));
     return items.Pass();
   }
   virtual ui::MenuModel* CreateContextMenu(
-      aura::RootWindow* root_window) OVERRIDE { return NULL; }
+      aura::Window* root_window) OVERRIDE { return NULL; }
   virtual ash::LauncherMenuModel* CreateApplicationMenu(
       int event_flags) OVERRIDE { return NULL; }
   virtual bool IsDraggable() OVERRIDE { return false; }
   virtual bool ShouldShowTooltip() OVERRIDE { return false; }
 
  private:
 
   DISALLOW_COPY_AND_ASSIGN(TestV2AppLauncherItemController);
 };
 
@@ skipping 1764 matching lines @@
 
   EXPECT_EQ(1, app_icon_loader->fetch_count());
   ASSERT_EQ(initial_size + 1, model_->items().size());
   EXPECT_TRUE(launcher_controller_->IsAppPinned("1"));
   EXPECT_FALSE(launcher_controller_->IsAppPinned("0"));
   EXPECT_EQ(ash::TYPE_APP_SHORTCUT, model_->items()[app_index].type);
 
   launcher_controller_->UnpinAppWithID("1");
   ASSERT_EQ(initial_size, model_->items().size());
 }