Remove unused AppKeepAliveService

apps/app_keep_alive_service_factory.cc

-// Copyright 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 "apps/app_keep_alive_service_factory.h"
-
-#include "apps/app_keep_alive_service.h"
-#include "apps/app_lifetime_monitor_factory.h"
-#include "apps/app_window_registry.h"
-#include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
-#include "extensions/browser/extensions_browser_client.h"
-
-namespace apps {
-
-// static
-AppKeepAliveServiceFactory* AppKeepAliveServiceFactory::GetInstance() {
-  return Singleton<AppKeepAliveServiceFactory>::get();
-}
-
-AppKeepAliveServiceFactory::AppKeepAliveServiceFactory()
-    : BrowserContextKeyedServiceFactory(
-          "AppKeepAliveService",
-          BrowserContextDependencyManager::GetInstance()) {
-  DependsOn(AppLifetimeMonitorFactory::GetInstance());
-}
-
-AppKeepAliveServiceFactory::~AppKeepAliveServiceFactory() {}
-
-BrowserContextKeyedService* AppKeepAliveServiceFactory::BuildServiceInstanceFor(
-    content::BrowserContext* context) const {
-  return new AppKeepAliveService(context);
-}
-
-bool AppKeepAliveServiceFactory::ServiceIsCreatedWithBrowserContext() const {
-  return true;
-}
-
-content::BrowserContext* AppKeepAliveServiceFactory::GetBrowserContextToUse(
-    content::BrowserContext* context) const {
-  return extensions::ExtensionsBrowserClient::Get()->
-      GetOriginalContext(context);
-}
-
-bool AppKeepAliveServiceFactory::ServiceIsNULLWhileTesting() const {
-  return true;
-}
-
-}  // namespace apps