Make GCMProfileService own GCMDriver, instead of deriving from it

chrome/browser/services/gcm/gcm_profile_service_factory.cc

 // Copyright (c) 2013 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/services/gcm/gcm_profile_service_factory.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
@@ skipping 32 matching lines @@
 #if !defined(OS_ANDROID)
   DependsOn(LoginUIServiceFactory::GetInstance());
 #endif
 }
 
 GCMProfileServiceFactory::~GCMProfileServiceFactory() {
 }
 
 KeyedService* GCMProfileServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
-  Profile* profile = static_cast<Profile*>(context);
-  GCMProfileService* service = new GCMProfileService(profile);
-  scoped_ptr<GCMClientFactory> gcm_client_factory(new GCMClientFactory);
-  service->Initialize(gcm_client_factory.Pass());
-  return service;
+  return new GCMProfileService(
+      Profile::FromBrowserContext(context),
+      scoped_ptr<GCMClientFactory>(new GCMClientFactory));
 }
 
 content::BrowserContext* GCMProfileServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextOwnInstanceInIncognito(context);
 }
 
 }  // namespace gcm