Move Singleton and related structs to namespace base

chrome/browser/signin/profile_oauth2_token_service_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/profile_oauth2_token_service_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/signin_error_controller_factory.h"
@@ skipping 24 matching lines @@
 
 ProfileOAuth2TokenService*
 ProfileOAuth2TokenServiceFactory::GetForProfile(Profile* profile) {
   return static_cast<ProfileOAuth2TokenService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 ProfileOAuth2TokenServiceFactory*
     ProfileOAuth2TokenServiceFactory::GetInstance() {
-  return Singleton<ProfileOAuth2TokenServiceFactory>::get();
+  return base::Singleton<ProfileOAuth2TokenServiceFactory>::get();
 }
 
 KeyedService* ProfileOAuth2TokenServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
 #if defined(OS_ANDROID)
   OAuth2TokenServiceDelegateAndroid* delegate =
       new OAuth2TokenServiceDelegateAndroid();
   delegate->Initialize();
 #else
   Profile* profile = static_cast<Profile*>(context);
   MutableProfileOAuth2TokenServiceDelegate* delegate =
       new MutableProfileOAuth2TokenServiceDelegate(
           ChromeSigninClientFactory::GetInstance()->GetForProfile(profile),
           SigninErrorControllerFactory::GetInstance()->GetForProfile(profile),
           AccountTrackerServiceFactory::GetInstance()->GetForProfile(profile));
 #endif
   ProfileOAuth2TokenService* service = new ProfileOAuth2TokenService(delegate);
   return service;
 }