Move Singleton and related structs to namespace base

extensions/browser/renderer_startup_helper.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 "extensions/browser/renderer_startup_helper.h"
 
 #include "base/values.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
@@ skipping 72 matching lines @@
 
 // static
 RendererStartupHelper* RendererStartupHelperFactory::GetForBrowserContext(
     BrowserContext* context) {
   return static_cast<RendererStartupHelper*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 RendererStartupHelperFactory* RendererStartupHelperFactory::GetInstance() {
-  return Singleton<RendererStartupHelperFactory>::get();
+  return base::Singleton<RendererStartupHelperFactory>::get();
 }
 
 RendererStartupHelperFactory::RendererStartupHelperFactory()
     : BrowserContextKeyedServiceFactory(
           "RendererStartupHelper",
           BrowserContextDependencyManager::GetInstance()) {
   // No dependencies on other services.
 }
 
 RendererStartupHelperFactory::~RendererStartupHelperFactory() {}
 
 KeyedService* RendererStartupHelperFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new RendererStartupHelper(context);
 }
 
 BrowserContext* RendererStartupHelperFactory::GetBrowserContextToUse(
     BrowserContext* context) const {
   // Redirected in incognito.
   return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
 }
 
 bool RendererStartupHelperFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 }  // namespace extensions