Support for multiple sync ModelSafeWorkers....

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 1510 matching lines @@
         'browser/ssl/ssl_manager.h',
         'browser/ssl/ssl_policy.cc',
         'browser/ssl/ssl_policy.h',
         'browser/ssl/ssl_policy_backend.cc',
         'browser/ssl/ssl_policy_backend.h',
         'browser/ssl/ssl_request_info.h',
         'browser/status_bubble.h',
         'browser/transport_security_persister.cc',
         'browser/transport_security_persister.h',
         'browser/sync/engine/syncapi.h',
-        'browser/sync/glue/bookmark_model_worker.cc',
-        'browser/sync/glue/bookmark_model_worker.h',
         'browser/sync/glue/bookmark_change_processor.h',
         'browser/sync/glue/bookmark_change_processor.cc',
         'browser/sync/glue/bookmark_model_associator.h',
         'browser/sync/glue/bookmark_model_associator.cc',
         'browser/sync/glue/change_processor.cc',
         'browser/sync/glue/change_processor.h',
         'browser/sync/glue/http_bridge.cc',
         'browser/sync/glue/http_bridge.h',
         'browser/sync/glue/model_associator.h',
         'browser/sync/glue/preference_change_processor.cc',
         'browser/sync/glue/preference_change_processor.h',
         'browser/sync/glue/preference_model_associator.cc',
         'browser/sync/glue/preference_model_associator.h',
         'browser/sync/glue/sync_backend_host.cc',
-        'browser/sync/glue/sync_backend_host.h',
+        'browser/sync/glue/sync_backend_host.h',        
+        'browser/sync/glue/ui_model_worker.cc',
+        'browser/sync/glue/ui_model_worker.h',
         'browser/sync/profile_sync_service.cc',
         'browser/sync/profile_sync_service.h',
         'browser/sync/sync_setup_flow.cc',
         'browser/sync/sync_setup_flow.h',
         'browser/sync/sync_setup_wizard.cc',
         'browser/sync/sync_setup_wizard.h',
         'browser/sync/sync_ui_util.cc',
         'browser/sync/sync_ui_util.h',
         'browser/sync/sync_ui_util_mac.mm',
         'browser/sync/sync_ui_util_mac.h',
@@ skipping 968 matching lines @@
       ],
     },
   ],
 }
 
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