One more round of extensions code ifdefing in profiles code.

chrome/browser/sync/profile_sync_components_factory_impl.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_SYNC_PROFILE_SYNC_COMPONENTS_FACTORY_IMPL_H__
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_COMPONENTS_FACTORY_IMPL_H__
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 84 matching lines @@
   // Used to bind a callback to give to DataTypeControllers to disable
   // data types.
   sync_driver::DataTypeController::DisableTypeCallback
       MakeDisableCallbackFor(syncer::ModelType type);
   void DisableBrokenType(syncer::ModelType type,
                          const tracked_objects::Location& from_here,
                          const std::string& message);
 
   Profile* profile_;
   base::CommandLine* command_line_;
-  // Set on the UI thread (since extensions::ExtensionSystemFactory is
-  // non-threadsafe); accessed on both the UI and FILE threads in
-  // GetSyncableServiceForType.
-  extensions::ExtensionSystem* extension_system_;
   scoped_refptr<autofill::AutofillWebDataService> web_data_service_;
 
   const GURL sync_service_url_;
   OAuth2TokenService* const token_service_;
   net::URLRequestContextGetter* const url_request_context_getter_;
 
   base::WeakPtrFactory<ProfileSyncComponentsFactoryImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncComponentsFactoryImpl);
 };
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_COMPONENTS_FACTORY_IMPL_H__