Remove profile-keyed factory boilerplates.

chrome/browser/extensions/api/history/history_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/history/history_api_factory.h"
-
-#include "chrome/browser/extensions/api/history/history_api.h"
-#include "chrome/browser/extensions/extension_system_factory.h"
-#include "chrome/browser/profiles/profile_dependency_manager.h"
-
-namespace extensions {
-
-// static
-HistoryAPI* HistoryAPIFactory::GetForProfile(
-    Profile* profile) {
-  return static_cast<HistoryAPI*>(
-      GetInstance()->GetServiceForProfile(profile, true));
-}
-
-// static
-HistoryAPIFactory* HistoryAPIFactory::GetInstance() {
-  return Singleton<HistoryAPIFactory>::get();
-}
-
-HistoryAPIFactory::HistoryAPIFactory()
-    : ProfileKeyedServiceFactory("HistoryAPI",
-                                 ProfileDependencyManager::GetInstance()) {
-  DependsOn(ExtensionSystemFactory::GetInstance());
-}
-
-HistoryAPIFactory::~HistoryAPIFactory() {
-}
-
-ProfileKeyedService* HistoryAPIFactory::BuildServiceInstanceFor(
-    Profile* profile) const {
-  return new HistoryAPI(profile);
-}
-
-bool HistoryAPIFactory::ServiceIsCreatedWithProfile() const {
-  return true;
-}
-
-bool HistoryAPIFactory::ServiceIsNULLWhileTesting() const {
-  return true;
-}
-
-}  // namespace extensions