Removed dead code from chrome/browser/extensions/api/preference

chrome/browser/extensions/api/preference/preference_api_factory.h

 // Copyright (c) 2012 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_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_FACTORY_H_
 #define CHROME_BROWSER_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_FACTORY_H_
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
 namespace extensions {
 class PreferenceAPI;
 
 class PreferenceAPIFactory : public ProfileKeyedServiceFactory {
  public:
-  static PreferenceAPI* GetForProfile(Profile* profile);
-
   static PreferenceAPIFactory* GetInstance();
 
  private:
   friend struct DefaultSingletonTraits<PreferenceAPIFactory>;
 
   PreferenceAPIFactory();
   virtual ~PreferenceAPIFactory();
 
   // ProfileKeyedBaseFactory implementation.
   virtual ProfileKeyedService* BuildServiceInstanceFor(
       Profile* profile) const OVERRIDE;
   virtual bool ServiceIsCreatedWithProfile() const OVERRIDE;
   virtual bool ServiceIsNULLWhileTesting() const OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_FACTORY_H_