Move Singleton and related structs to namespace base

chrome/browser/extensions/menu_manager_factory.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/extensions/menu_manager_factory.h"
 
 #include "chrome/browser/extensions/menu_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/extension_system_provider.h"
 #include "extensions/browser/extensions_browser_client.h"
 
 namespace extensions {
 
 // static
 MenuManager* MenuManagerFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<MenuManager*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 MenuManagerFactory* MenuManagerFactory::GetInstance() {
-  return Singleton<MenuManagerFactory>::get();
+  return base::Singleton<MenuManagerFactory>::get();
 }
 
 // static
 scoped_ptr<KeyedService> MenuManagerFactory::BuildServiceInstanceForTesting(
     content::BrowserContext* context) {
   return make_scoped_ptr(GetInstance()->BuildServiceInstanceFor(context));
 }
 
 MenuManagerFactory::MenuManagerFactory()
     : BrowserContextKeyedServiceFactory(
@@ skipping 17 matching lines @@
 
 bool MenuManagerFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 bool MenuManagerFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace extensions