Move Singleton and related structs to namespace base

chrome/browser/chromeos/login/signin/oauth2_login_manager_factory.cc

 // Copyright 2014 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/login/signin/oauth2_login_manager_factory.h"
 
 #include "chrome/browser/chromeos/login/signin/oauth2_login_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/account_tracker_service_factory.h"
 #include "chrome/browser/signin/gaia_cookie_manager_service_factory.h"
@@ skipping 21 matching lines @@
 // static
 OAuth2LoginManager* OAuth2LoginManagerFactory::GetForProfile(
     Profile* profile) {
   return static_cast<OAuth2LoginManager*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 OAuth2LoginManagerFactory*
     OAuth2LoginManagerFactory::GetInstance() {
-  return Singleton<OAuth2LoginManagerFactory>::get();
+  return base::Singleton<OAuth2LoginManagerFactory>::get();
 }
 
 KeyedService* OAuth2LoginManagerFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   Profile* profile = static_cast<Profile*>(context);
   OAuth2LoginManager* service;
   service = new OAuth2LoginManager(profile);
   return service;
 }
 
 }  // namespace chromeos