sync: Loop committing items without downloading updates (v2)

sync/sync.gyp

 # Copyright (c) 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     # The core sync library.
@@ skipping 23 matching lines @@
       ],
       'sources': [
         'engine/apply_updates_command.cc',
         'engine/apply_updates_command.h',
         'engine/build_commit_command.cc',
         'engine/build_commit_command.h',
         'engine/cleanup_disabled_types_command.cc',
         'engine/cleanup_disabled_types_command.h',
         'engine/clear_data_command.cc',
         'engine/clear_data_command.h',
+        'engine/commit.cc',
+        'engine/commit.h',
         'engine/conflict_resolver.cc',
         'engine/conflict_resolver.h',
         'engine/download_updates_command.cc',
         'engine/download_updates_command.h',
         'engine/get_commit_ids_command.cc',
         'engine/get_commit_ids_command.h',
         'engine/model_changing_syncer_command.cc',
         'engine/model_changing_syncer_command.h',
         'engine/model_safe_worker.cc',
         'engine/model_safe_worker.h',
         'engine/passive_model_worker.cc',
         'engine/passive_model_worker.h',
         'engine/net/server_connection_manager.cc',
         'engine/net/server_connection_manager.h',
         'engine/net/url_translator.cc',
         'engine/net/url_translator.h',
         'engine/nigori_util.cc',
         'engine/nigori_util.h',
         'engine/nudge_source.cc',
         'engine/nudge_source.h',
         'engine/polling_constants.cc',
         'engine/polling_constants.h',
-        'engine/post_commit_message_command.cc',
-        'engine/post_commit_message_command.h',
         'engine/process_commit_response_command.cc',
         'engine/process_commit_response_command.h',
         'engine/process_updates_command.cc',
         'engine/process_updates_command.h',
         'engine/resolve_conflicts_command.cc',
         'engine/resolve_conflicts_command.h',
         'engine/store_timestamps_command.cc',
         'engine/store_timestamps_command.h',
         'engine/syncer.cc',
         'engine/syncer.h',
@@ skipping 650 matching lines @@
         '../net/net.gyp:net_test_support',
         'sync',
         'sync_notifier',
       ],
       'sources': [
         'tools/sync_listen_notifications.cc',
       ],
     },
   ],
 }