Move Singleton and related structs to namespace base

chrome/browser/extensions/api/passwords_private/passwords_private_delegate_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 "chrome/browser/extensions/api/passwords_private/passwords_private_delegate_factory.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/passwords_private/passwords_private_delegate_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_system_provider.h"
 
 namespace extensions {
 
 using content::BrowserContext;
 
 // static
 PasswordsPrivateDelegate* PasswordsPrivateDelegateFactory::GetForBrowserContext(
     BrowserContext* browser_context,
     bool create) {
   return static_cast<PasswordsPrivateDelegate*>(
       GetInstance()->GetServiceForBrowserContext(browser_context, create));
 }
 
 // static
 PasswordsPrivateDelegateFactory*
     PasswordsPrivateDelegateFactory::GetInstance() {
-  return Singleton<PasswordsPrivateDelegateFactory>::get();
+  return base::Singleton<PasswordsPrivateDelegateFactory>::get();
 }
 
 PasswordsPrivateDelegateFactory::PasswordsPrivateDelegateFactory()
     : BrowserContextKeyedServiceFactory(
           "PasswordsPrivateDelegate",
           BrowserContextDependencyManager::GetInstance()) {
 }
 
 PasswordsPrivateDelegateFactory::~PasswordsPrivateDelegateFactory() {
 }
 
 KeyedService* PasswordsPrivateDelegateFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new PasswordsPrivateDelegateImpl(static_cast<Profile*>(profile));
 }
 
 bool PasswordsPrivateDelegateFactory::
     ServiceIsCreatedWithBrowserContext() const {
   return false;
 }
 
 bool PasswordsPrivateDelegateFactory::ServiceIsNULLWhileTesting() const {
   return false;
 }
 
 }  // namespace extensions