Add GROUP_FILE ModelSafeGroup

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 2069 matching lines @@
         'browser/sync/glue/data_type_manager.cc',
         'browser/sync/glue/data_type_manager.h',
         'browser/sync/glue/data_type_manager_impl.cc',
         'browser/sync/glue/data_type_manager_impl.h',
         'browser/sync/glue/database_model_worker.cc',
         'browser/sync/glue/database_model_worker.h',
         'browser/sync/glue/do_optimistic_refresh_task.cc',
         'browser/sync/glue/do_optimistic_refresh_task.h',
         'browser/sync/glue/extension_data_type_controller.cc',
         'browser/sync/glue/extension_data_type_controller.h',
+        'browser/sync/glue/file_model_worker.cc',
+        'browser/sync/glue/file_model_worker.h',
         'browser/sync/glue/frontend_data_type_controller.cc',
         'browser/sync/glue/frontend_data_type_controller.h',
         'browser/sync/glue/generic_change_processor.cc',
         'browser/sync/glue/generic_change_processor.h',
         'browser/sync/glue/history_model_worker.cc',
         'browser/sync/glue/history_model_worker.h',
         'browser/sync/glue/http_bridge.cc',
         'browser/sync/glue/http_bridge.h',
         'browser/sync/glue/model_associator.h',
         'browser/sync/glue/non_frontend_data_type_controller.cc',
@@ skipping 2951 matching lines @@
               # weak imports in dependents, who still must #include
               # closure_blocks_leopard_compat.h to get weak imports.
               'type': 'none',
             }],
           ],
         },
       ],
     }],
   ],
 }