Support for multiple sync ModelSafeWorkers....

chrome/chrome.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
@@ skipping 816 matching lines @@
         'browser/sync/sessions/sync_session.cc',
         'browser/sync/sessions/sync_session.h',
         'browser/sync/sessions/sync_session_context.h',
         'browser/sync/syncable/blob.h',
         'browser/sync/syncable/dir_open_result.h',
         'browser/sync/syncable/directory_backing_store.cc',
         'browser/sync/syncable/directory_backing_store.h',
         'browser/sync/syncable/directory_event.h',
         'browser/sync/syncable/directory_manager.cc',
         'browser/sync/syncable/directory_manager.h',
+        'browser/sync/syncable/model_type.h',
         'browser/sync/syncable/path_name_cmp.h',
         'browser/sync/syncable/syncable-inl.h',
         'browser/sync/syncable/syncable.cc',
         'browser/sync/syncable/syncable.h',
         'browser/sync/syncable/syncable_changes_version.h',
         'browser/sync/syncable/syncable_columns.h',
         'browser/sync/syncable/syncable_id.cc',
         'browser/sync/syncable/syncable_id.h',
         'browser/sync/util/character_set_converters.h',
         'browser/sync/util/character_set_converters_posix.cc',
@@ skipping 667 matching lines @@
       }],  # targets
     }],  # OS=="linux" or OS=="freebsd"
   ],  # 'conditions'
 }
 
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