[components] Switch {RefCounted}ProfileKeyedService to use BrowserContext

chrome/browser/extensions/install_tracker_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/extensions/install_tracker_factory.h"
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/install_tracker.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 
 namespace extensions {
 
 // static
 InstallTracker* InstallTrackerFactory::GetForProfile(Profile* profile) {
   return static_cast<InstallTracker*>(
       GetInstance()->GetServiceForProfile(profile, true));
 }
 
 InstallTrackerFactory* InstallTrackerFactory::GetInstance() {
   return Singleton<InstallTrackerFactory>::get();
 }
 
 InstallTrackerFactory::InstallTrackerFactory()
     : ProfileKeyedServiceFactory("InstallTracker",
                                  ProfileDependencyManager::GetInstance()) {
   DependsOn(ExtensionSystemFactory::GetInstance());
 }
 
 InstallTrackerFactory::~InstallTrackerFactory() {
 }
 
 ProfileKeyedService* InstallTrackerFactory::BuildServiceInstanceFor(
-    Profile* profile) const {
+    content::BrowserContext* context) const {
+  Profile* profile = static_cast<Profile*>(context);
   ExtensionService* service =
       extensions::ExtensionSystem::Get(profile)->extension_service();
   return new InstallTracker(profile, service->extension_prefs());
 }
 
 bool InstallTrackerFactory::ServiceRedirectedInIncognito() const {
   // The installs themselves are routed to the non-incognito profile and so
   // should the install progress.
   return true;
 }
 
 }  // namespace extensions