[SyncFS] Split SyncEngine and SyncEngineContext

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 2398 matching lines @@
         'browser/sync_file_system/drive_backend/metadata_database_index.cc',
         'browser/sync_file_system/drive_backend/metadata_database_index.h',
         'browser/sync_file_system/drive_backend/metadata_db_migration_util.cc',
         'browser/sync_file_system/drive_backend/metadata_db_migration_util.h',
         'browser/sync_file_system/drive_backend/register_app_task.cc',
         'browser/sync_file_system/drive_backend/register_app_task.h',
         'browser/sync_file_system/drive_backend/remote_to_local_syncer.cc',
         'browser/sync_file_system/drive_backend/remote_to_local_syncer.h',
         'browser/sync_file_system/drive_backend/sync_engine.cc',
         'browser/sync_file_system/drive_backend/sync_engine.h',
+        'browser/sync_file_system/drive_backend/sync_engine_context.cc',
         'browser/sync_file_system/drive_backend/sync_engine_context.h',
         '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/task_dependency_manager.cc',
@@ skipping 1452 matching lines @@
             'package_name': 'org/chromium/chrome/browser',
             'template_deps': ['browser/android/tab_load_status.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }