sync: Make nudge + config jobs reliable in SyncerThread2

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 2895 matching lines @@
         'browser/sync/engine/clear_data_command_unittest.cc',
         'browser/sync/engine/cleanup_disabled_types_command_unittest.cc',
         'browser/sync/engine/download_updates_command_unittest.cc',
         'browser/sync/engine/mock_model_safe_workers.cc',
         'browser/sync/engine/mock_model_safe_workers.h',
         'browser/sync/engine/process_commit_response_command_unittest.cc',
         'browser/sync/engine/syncapi_unittest.cc',
         'browser/sync/engine/syncer_proto_util_unittest.cc',
         'browser/sync/engine/syncer_thread_unittest.cc',
         'browser/sync/engine/syncer_thread2_unittest.cc',
+        'browser/sync/engine/syncer_thread2_whitebox_unittest.cc',
         'browser/sync/engine/syncer_unittest.cc',
         'browser/sync/engine/syncproto_unittest.cc',
         'browser/sync/engine/syncapi_mock.h',
         'browser/sync/engine/verify_updates_command_unittest.cc',
         'browser/sync/js_arg_list_unittest.cc',
         'browser/sync/js_event_handler_list_unittest.cc',
         'browser/sync/js_sync_manager_observer_unittest.cc',
         'browser/sync/notifier/cache_invalidation_packet_handler_unittest.cc',
         'browser/sync/notifier/chrome_invalidation_client_unittest.cc',
         'browser/sync/notifier/chrome_system_resources_unittest.cc',
@@ skipping 910 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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