[SyncFS] Create SyncWorkerInterface

chrome/chrome_browser.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': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2351 matching lines @@
         'browser/sync_file_system/drive_backend/sync_engine_initializer.cc',
         'browser/sync_file_system/drive_backend/sync_engine_initializer.h',
         'browser/sync_file_system/drive_backend/sync_task.cc',
         'browser/sync_file_system/drive_backend/sync_task.h',
         'browser/sync_file_system/drive_backend/sync_task_manager.cc',
         'browser/sync_file_system/drive_backend/sync_task_manager.h',
         'browser/sync_file_system/drive_backend/sync_task_token.cc',
         'browser/sync_file_system/drive_backend/sync_task_token.h',
         'browser/sync_file_system/drive_backend/sync_worker.cc',
         'browser/sync_file_system/drive_backend/sync_worker.h',
+        'browser/sync_file_system/drive_backend/sync_worker_interface.h',
         'browser/sync_file_system/drive_backend/task_dependency_manager.cc',
         'browser/sync_file_system/drive_backend/task_dependency_manager.h',
         'browser/sync_file_system/drive_backend/tracker_id_set.cc',
         'browser/sync_file_system/drive_backend/tracker_id_set.h',
         'browser/sync_file_system/drive_backend/uninstall_app_task.cc',
         'browser/sync_file_system/drive_backend/uninstall_app_task.h',
         'browser/sync_file_system/drive_backend_v1/api_util.cc',
         'browser/sync_file_system/drive_backend_v1/api_util.h',
         'browser/sync_file_system/drive_backend_v1/api_util_interface.h',
         'browser/sync_file_system/drive_backend_v1/drive_file_sync_service.cc',
@@ skipping 1389 matching lines @@
             'package_name': 'org/chromium/chrome/browser',
             'template_deps': ['browser/android/tab_load_status.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }