Move Singleton and related structs to namespace base

chrome/browser/chromeos/app_mode/kiosk_app_update_service.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/chromeos/app_mode/kiosk_app_update_service.h"
 
 #include "base/logging.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part_chromeos.h"
@@ skipping 147 matching lines @@
   DCHECK(chrome::IsRunningInForcedAppMode());
   if (!chrome::IsRunningInForcedAppMode())
     return NULL;
 
   return static_cast<KioskAppUpdateService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 KioskAppUpdateServiceFactory* KioskAppUpdateServiceFactory::GetInstance() {
-  return Singleton<KioskAppUpdateServiceFactory>::get();
+  return base::Singleton<KioskAppUpdateServiceFactory>::get();
 }
 
 KeyedService* KioskAppUpdateServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new KioskAppUpdateService(
       Profile::FromBrowserContext(context),
       g_browser_process->platform_part()->automatic_reboot_manager());
 }
 
 }  // namespace chromeos