Remove some Profile-keyed factory boilerplate: management omnibox preference push_messaging.

chrome/browser/extensions/api/push_messaging/push_messaging_api_factory.cc

-// Copyright (c) 2012 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/push_messaging/push_messaging_api_factory.h"
-
-#include "chrome/browser/extensions/api/push_messaging/push_messaging_api.h"
-#include "chrome/browser/extensions/extension_system_factory.h"
-#include "chrome/browser/profiles/profile_dependency_manager.h"
-#include "chrome/browser/sync/profile_sync_service_factory.h"
-
-namespace extensions {
-
-// static
-PushMessagingAPI* PushMessagingAPIFactory::GetForProfile(
-    Profile* profile) {
-  return static_cast<PushMessagingAPI*>(
-      GetInstance()->GetServiceForProfile(profile, true));
-}
-
-// static
-PushMessagingAPIFactory* PushMessagingAPIFactory::GetInstance() {
-  return Singleton<PushMessagingAPIFactory>::get();
-}
-
-PushMessagingAPIFactory::PushMessagingAPIFactory()
-    : ProfileKeyedServiceFactory("PushMessagingAPI",
-                                 ProfileDependencyManager::GetInstance()) {
-  DependsOn(extensions::ExtensionSystemFactory::GetInstance());
-  DependsOn(ProfileSyncServiceFactory::GetInstance());
-}
-
-PushMessagingAPIFactory::~PushMessagingAPIFactory() {
-}
-
-ProfileKeyedService* PushMessagingAPIFactory::BuildServiceInstanceFor(
-    Profile* profile) const {
-  return new PushMessagingAPI(profile);
-}
-
-bool PushMessagingAPIFactory::ServiceIsNULLWhileTesting() const {
-  return true;
-}
-
-}  // namespace extensions