Move Singleton and related structs to namespace base

extensions/browser/api/networking_config/networking_config_service_factory.cc

 // Copyright 2015 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 "extensions/browser/api/networking_config/networking_config_service_factory.h"
 
 #include <string>
 
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/api/networking_config/networking_config_service.h"
@@ skipping 36 matching lines @@
 
 // static
 NetworkingConfigService* NetworkingConfigServiceFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<NetworkingConfigService*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 NetworkingConfigServiceFactory* NetworkingConfigServiceFactory::GetInstance() {
-  return Singleton<NetworkingConfigServiceFactory>::get();
+  return base::Singleton<NetworkingConfigServiceFactory>::get();
 }
 
 NetworkingConfigServiceFactory::NetworkingConfigServiceFactory()
     : BrowserContextKeyedServiceFactory(
           "NetworkingConfigService",
           BrowserContextDependencyManager::GetInstance()) {
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
   DependsOn(extensions::ExtensionRegistryFactory::GetInstance());
 }
 
 NetworkingConfigServiceFactory::~NetworkingConfigServiceFactory() {
 }
 
 KeyedService* NetworkingConfigServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new NetworkingConfigService(
       context, make_scoped_ptr(new DefaultEventDelegate(context)),
       ExtensionRegistry::Get(context));
 }
 
 content::BrowserContext* NetworkingConfigServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
 }
 
 }  // namespace extensions