Revert 124461 - Remove the singleton instance get/delete methods from RootWindow (yay)

chrome/test/base/ui_test_utils.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 "chrome/test/base/ui_test_utils.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 260 matching lines @@
 }  // namespace
 
 void RunMessageLoop() {
   MessageLoop* loop = MessageLoop::current();
   MessageLoopForUI* ui_loop =
       content::BrowserThread::CurrentlyOn(content::BrowserThread::UI) ?
           MessageLoopForUI::current() : NULL;
   MessageLoop::ScopedNestableTaskAllower allow(loop);
   if (ui_loop) {
 #if defined(USE_AURA)
+    ash::Shell::GetRootWindow()->ShowRootWindow();
     ui_loop->Run();
 #elif defined(TOOLKIT_VIEWS)
     views::AcceleratorHandler handler;
     ui_loop->RunWithDispatcher(&handler);
 #elif defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
     ui_loop->RunWithDispatcher(NULL);
 #else
     ui_loop->Run();
 #endif
   } else {
@@ skipping 839 matching lines @@
   return taker.TakeRenderWidgetSnapshot(rwh, page_size, page_size, bitmap);
 }
 
 bool TakeEntirePageSnapshot(RenderViewHost* rvh, SkBitmap* bitmap) {
   DCHECK(bitmap);
   SnapshotTaker taker;
   return taker.TakeEntirePageSnapshot(rvh, bitmap);
 }
 
 }  // namespace ui_test_utils