[components] Switch {RefCounted}ProfileKeyedService to use BrowserContext

chrome/browser/profiles/startup_task_runner_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/profiles/startup_task_runner_service_factory.h"
 
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/profiles/startup_task_runner_service.h"
 
 StartupTaskRunnerServiceFactory::StartupTaskRunnerServiceFactory()
     : ProfileKeyedServiceFactory("StartupTaskRunnerServiceFactory",
                                  ProfileDependencyManager::GetInstance()) {
 }
 
 StartupTaskRunnerServiceFactory::~StartupTaskRunnerServiceFactory() {}
 
 // static
 StartupTaskRunnerService* StartupTaskRunnerServiceFactory::GetForProfile(
     Profile* profile) {
   return static_cast<StartupTaskRunnerService*>(
       GetInstance()->GetServiceForProfile(profile, true));
 }
 
 // static
 StartupTaskRunnerServiceFactory*
     StartupTaskRunnerServiceFactory::GetInstance() {
   return Singleton<StartupTaskRunnerServiceFactory>::get();
 }
 
 ProfileKeyedService* StartupTaskRunnerServiceFactory::BuildServiceInstanceFor(
-    Profile* profile) const {
-  return new StartupTaskRunnerService(profile);
+    content::BrowserContext* profile) const {
+  return new StartupTaskRunnerService(static_cast<Profile*>(profile));
 }