[components] Switch {RefCounted}ProfileKeyedService to use BrowserContext

chrome/browser/download/download_service_factory.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_FACTORY_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/singleton.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
 class DownloadService;
 class Profile;
 
 // Singleton that owns all DownloadServices and associates them with
 // Profiles. Listens for the Profile's destruction notification and cleans up
 // the associated DownloadService.
 class DownloadServiceFactory : public ProfileKeyedServiceFactory {
  public:
   // Returns the DownloadService for |profile|, creating if not yet created.
   static DownloadService* GetForProfile(Profile* profile);
 
   static DownloadServiceFactory* GetInstance();
 
  protected:
   // ProfileKeyedServiceFactory:
   virtual ProfileKeyedService* BuildServiceInstanceFor(
-      Profile* profile) const OVERRIDE;
+      content::BrowserContext* profile) const OVERRIDE;
   virtual bool ServiceHasOwnInstanceInIncognito() const OVERRIDE;
 
  private:
   friend struct DefaultSingletonTraits<DownloadServiceFactory>;
 
   DownloadServiceFactory();
   virtual ~DownloadServiceFactory();
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_FACTORY_H_