[Sync] Fix ConfigureDataTypes bug that leads to extra nudge

chrome/chrome_tests.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.
 
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
@@ skipping 1522 matching lines @@
         'browser/sync/glue/frontend_data_type_controller_mock.h',
         'browser/sync/glue/frontend_data_type_controller_unittest.cc',
         'browser/sync/glue/http_bridge_unittest.cc',
         'browser/sync/glue/model_associator_mock.cc',
         'browser/sync/glue/model_associator_mock.h',
         'browser/sync/glue/preference_data_type_controller_unittest.cc',
         'browser/sync/glue/preference_model_associator_unittest.cc',
         'browser/sync/glue/session_model_associator_unittest.cc',
         'browser/sync/glue/sync_backend_host_mock.cc',
         'browser/sync/glue/sync_backend_host_mock.h',
+        'browser/sync/glue/sync_backend_host_unittest.cc',
         'browser/sync/glue/theme_data_type_controller_unittest.cc',
         'browser/sync/glue/theme_util_unittest.cc',
         'browser/sync/glue/typed_url_model_associator_unittest.cc',
         'browser/sync/glue/ui_model_worker_unittest.cc',
         'browser/sync/profile_sync_factory_impl_unittest.cc',
         'browser/sync/profile_sync_factory_mock.cc',
         'browser/sync/profile_sync_factory_mock.h',
         'browser/sync/profile_sync_service_autofill_unittest.cc',
         'browser/sync/profile_sync_service_bookmark_unittest.cc',
         'browser/sync/profile_sync_service_password_unittest.cc',
@@ skipping 2264 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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