[SyncFS] Add a test to SyncProcessRunner

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1427 matching lines @@
         'browser/sync_file_system/mock_local_change_processor.cc',
         'browser/sync_file_system/mock_local_change_processor.h',
         'browser/sync_file_system/mock_remote_change_processor.cc',
         'browser/sync_file_system/mock_remote_change_processor.h',
         'browser/sync_file_system/mock_remote_file_sync_service.cc',
         'browser/sync_file_system/mock_remote_file_sync_service.h',
         'browser/sync_file_system/subtree_set_unittest.cc',
         'browser/sync_file_system/sync_file_system_service_unittest.cc',
         'browser/sync_file_system/sync_file_system_test_util.cc',
         'browser/sync_file_system/sync_file_system_test_util.h',
+        'browser/sync_file_system/sync_process_runner_unittest.cc',
         'browser/sync_file_system/syncable_file_system_util_unittest.cc',
         'browser/task_manager/task_manager_unittest.cc',
         'browser/task_manager/task_manager_util_unittest.cc',
         'browser/task_profiler/task_profiler_data_serializer_unittest.cc',
         'browser/themes/browser_theme_pack_unittest.cc',
         'browser/themes/theme_properties_unittest.cc',
         'browser/themes/theme_service_unittest.cc',
         'browser/themes/theme_syncable_service_unittest.cc',
         'browser/thumbnails/content_analysis_unittest.cc',
         'browser/thumbnails/content_based_thumbnailing_algorithm_unittest.cc',
@@ skipping 1458 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }