Move Singleton and related structs to namespace base

chrome/browser/chromeos/policy/user_cloud_policy_token_forwarder_factory.cc

 // Copyright (c) 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/chromeos/policy/user_cloud_policy_token_forwarder_factory.h"
 
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
 #include "chrome/browser/chromeos/policy/user_cloud_policy_token_forwarder.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 
 namespace policy {
 
 // static
 UserCloudPolicyTokenForwarderFactory*
     UserCloudPolicyTokenForwarderFactory::GetInstance() {
-  return Singleton<UserCloudPolicyTokenForwarderFactory>::get();
+  return base::Singleton<UserCloudPolicyTokenForwarderFactory>::get();
 }
 
 UserCloudPolicyTokenForwarderFactory::UserCloudPolicyTokenForwarderFactory()
     : BrowserContextKeyedServiceFactory(
         "UserCloudPolicyTokenForwarder",
         BrowserContextDependencyManager::GetInstance()) {
   DependsOn(SigninManagerFactory::GetInstance());
   DependsOn(ProfileOAuth2TokenServiceFactory::GetInstance());
   DependsOn(UserCloudPolicyManagerFactoryChromeOS::GetInstance());
 }
@@ skipping 21 matching lines @@
   // during startup.
   return true;
 }
 
 bool UserCloudPolicyTokenForwarderFactory::ServiceIsNULLWhileTesting() const {
   // This is only needed in a handful of tests that manually create the object.
   return true;
 }
 
 }  // namespace policy