Move Singleton and related structs to namespace base

chrome/browser/signin/about_signin_internals_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/about_signin_internals_factory.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/account_tracker_service_factory.h"
 #include "chrome/browser/signin/chrome_signin_client_factory.h"
 #include "chrome/browser/signin/gaia_cookie_manager_service_factory.h"
@@ skipping 20 matching lines @@
 
 // static
 AboutSigninInternals* AboutSigninInternalsFactory::GetForProfile(
     Profile* profile) {
   return static_cast<AboutSigninInternals*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 AboutSigninInternalsFactory* AboutSigninInternalsFactory::GetInstance() {
-  return Singleton<AboutSigninInternalsFactory>::get();
+  return base::Singleton<AboutSigninInternalsFactory>::get();
 }
 
 void AboutSigninInternalsFactory::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* user_prefs) {
   AboutSigninInternals::RegisterPrefs(user_prefs);
 }
 
 KeyedService* AboutSigninInternalsFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   Profile* profile = Profile::FromBrowserContext(context);
   AboutSigninInternals* service = new AboutSigninInternals(
       ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
       AccountTrackerServiceFactory::GetForProfile(profile),
       SigninManagerFactory::GetForProfile(profile),
       SigninErrorControllerFactory::GetForProfile(profile),
       GaiaCookieManagerServiceFactory::GetForProfile(profile));
   service->Initialize(ChromeSigninClientFactory::GetForProfile(profile));
   return service;
 }