Implement a bag of chips for sync.

sync/engine/download_updates_command.cc

 // 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.
 
 #include "sync/engine/download_updates_command.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "sync/engine/syncer.h"
@@ skipping 93 matching lines @@
   get_updates->set_fetch_folders(true);
 
   // Set GetUpdatesMessage.GetUpdatesCallerInfo information.
   get_updates->mutable_caller_info()->set_source(
       session->source().updates_source);
   get_updates->mutable_caller_info()->set_notifications_enabled(
       session->context()->notifications_enabled());
 
   SyncerProtoUtil::SetProtocolVersion(&client_to_server_message);
   SyncerProtoUtil::AddRequestBirthday(dir, &client_to_server_message);
+  SyncerProtoUtil::AddBagOfChips(dir, &client_to_server_message);
 
   DebugInfo* debug_info = client_to_server_message.mutable_debug_info();
 
   AppendClientDebugInfoIfNeeded(session, debug_info);
 
   SyncerError result = SyncerProtoUtil::PostClientToServerMessage(
       client_to_server_message,
       &update_response,
       session);
 
@@ skipping 34 matching lines @@
     // could be null in some unit tests.
     if (session->context()->debug_info_getter()) {
       session->context()->debug_info_getter()->GetAndClearDebugInfo(
           debug_info);
     }
     session->mutable_status_controller()->set_debug_info_sent();
   }
 }
 
 }  // namespace syncer