Move Singleton and related structs to namespace base

ios/chrome/browser/autofill/personal_data_manager_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 "ios/chrome/browser/autofill/personal_data_manager_factory.h"
 
 #include "base/memory/singleton.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/browser_state_otr_helper.h"
 #include "ios/chrome/browser/signin/account_tracker_service_factory.h"
 #include "ios/chrome/browser/web_data_service_factory.h"
 #include "ios/public/provider/chrome/browser/browser_state/chrome_browser_state.h"
 
 // static
 autofill::PersonalDataManager* PersonalDataManagerFactory::GetForBrowserState(
     ios::ChromeBrowserState* browser_state) {
   return static_cast<autofill::PersonalDataManager*>(
       GetInstance()->GetServiceForBrowserState(browser_state, true));
 }
 
 // static
 PersonalDataManagerFactory* PersonalDataManagerFactory::GetInstance() {
-  return Singleton<PersonalDataManagerFactory>::get();
+  return base::Singleton<PersonalDataManagerFactory>::get();
 }
 
 PersonalDataManagerFactory::PersonalDataManagerFactory()
     : BrowserStateKeyedServiceFactory(
           "PersonalDataManager",
           BrowserStateDependencyManager::GetInstance()) {
   DependsOn(ios::AccountTrackerServiceFactory::GetInstance());
   DependsOn(ios::WebDataServiceFactory::GetInstance());
 }
 
 PersonalDataManagerFactory::~PersonalDataManagerFactory() {}
 
 scoped_ptr<KeyedService> PersonalDataManagerFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   ios::ChromeBrowserState* chrome_browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
   scoped_ptr<autofill::PersonalDataManager> service(
       new autofill::PersonalDataManager(
           GetApplicationContext()->GetApplicationLocale()));
   service->Init(ios::WebDataServiceFactory::GetAutofillWebDataForBrowserState(
                     chrome_browser_state, ServiceAccessType::EXPLICIT_ACCESS),
                 chrome_browser_state->GetPrefs(),
                 ios::AccountTrackerServiceFactory::GetForBrowserState(
                     chrome_browser_state),
                 chrome_browser_state->IsOffTheRecord());
   return service.Pass();
 }