Move Singleton and related structs to namespace base

chrome/browser/signin/signin_manager_factory.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/signin/signin_manager_factory.h"
 
 #include "base/prefs/pref_registry_simple.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/account_tracker_service_factory.h"
@@ skipping 56 matching lines @@
 const SigninManager* SigninManagerFactory::GetForProfileIfExists(
     const Profile* profile) {
   return static_cast<const SigninManager*>(
       GetInstance()->GetServiceForBrowserContext(
           const_cast<Profile*>(profile), false));
 }
 #endif
 
 // static
 SigninManagerFactory* SigninManagerFactory::GetInstance() {
-  return Singleton<SigninManagerFactory>::get();
+  return base::Singleton<SigninManagerFactory>::get();
 }
 
 void SigninManagerFactory::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   SigninManagerBase::RegisterProfilePrefs(registry);
   LocalAuth::RegisterLocalAuthPrefs(registry);
 }
 
 // static
 void SigninManagerFactory::RegisterPrefs(PrefRegistrySimple* registry) {
@@ skipping 36 matching lines @@
 }
 
 void SigninManagerFactory::BrowserContextShutdown(
     content::BrowserContext* context) {
   SigninManagerBase* manager = static_cast<SigninManagerBase*>(
       GetServiceForBrowserContext(context, false));
   if (manager)
     FOR_EACH_OBSERVER(Observer, observer_list_, SigninManagerShutdown(manager));
   BrowserContextKeyedServiceFactory::BrowserContextShutdown(context);
 }