[Ash] Always show the root window

chrome/browser/chrome_browser_main_extra_parts_ash.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/browser/chrome_browser_main_extra_parts_ash.h"
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
 #include "ash/wm/key_rewriter_event_filter.h"
@@ skipping 65 matching lines @@
   shell->accelerator_controller()->SetVolumeControlDelegate(
       scoped_ptr<ash::VolumeControlDelegate>(new VolumeController).Pass());
 
   if (!CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableZeroBrowsersOpenForTests))
     BrowserList::StartKeepAlive();
 #endif
   gesture_handler_.reset(new UserGestureHandler);
   aura::client::SetUserGestureClient(
       ash::Shell::GetRootWindow(), gesture_handler_.get());
+  ash::Shell::GetRootWindow()->ShowRootWindow();
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostProfileInit() {
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostMainMessageLoopRun() {
   ash::Shell::DeleteInstance();
 }