Add optional creation to ProfileKeyedServiceFactory.

chrome/browser/notifications/desktop_notification_service_factory.cc

 // Copyright (c) 2011 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/notifications/desktop_notification_service_factory.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "content/browser/browser_thread.h"
 
 // static
 DesktopNotificationService* DesktopNotificationServiceFactory::GetForProfile(
     Profile* profile) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return static_cast<DesktopNotificationService*>(
-      GetInstance()->GetServiceForProfile(profile));
+      GetInstance()->GetServiceForProfile(profile, true));
 }
 
 // static
 DesktopNotificationServiceFactory* DesktopNotificationServiceFactory::
     GetInstance() {
   return Singleton<DesktopNotificationServiceFactory>::get();
 }
 
 DesktopNotificationServiceFactory::DesktopNotificationServiceFactory()
     : ProfileKeyedServiceFactory(ProfileDependencyManager::GetInstance()) {
 }
 
 DesktopNotificationServiceFactory::~DesktopNotificationServiceFactory() {
 }
 
 ProfileKeyedService* DesktopNotificationServiceFactory::BuildServiceInstanceFor(
     Profile* profile) const {
   DesktopNotificationService* service = new DesktopNotificationService(profile,
       g_browser_process->notification_ui_manager());
 
   return service;
 }
 
 bool DesktopNotificationServiceFactory::ServiceHasOwnInstanceInIncognito() {
   return true;
 }