Drop more dependencies of ProfileKeyedService infrastructure on chrome.

chrome/browser/managed_mode/managed_user_service_factory.h

 // 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.
 
 #ifndef CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SERVICE_FACTORY_H_
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
 class ManagedUserService;
+class Profile;
 
 class ManagedUserServiceFactory : public ProfileKeyedServiceFactory {
  public:
   static ManagedUserService* GetForProfile(Profile* profile);
 
   static ManagedUserServiceFactory* GetInstance();
 
   // Used to create instances for testing.
   static ProfileKeyedService* BuildInstanceFor(Profile* profile);
 
  private:
   friend struct DefaultSingletonTraits<ManagedUserServiceFactory>;
 
   ManagedUserServiceFactory();
   virtual ~ManagedUserServiceFactory();
 
   // ProfileKeyedServiceFactory:
   virtual content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const OVERRIDE;
   virtual ProfileKeyedService* BuildServiceInstanceFor(
       content::BrowserContext* profile) const OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SERVICE_FACTORY_H_