[Sync] Store the past 10 traffic records in memory.

sync/engine/traffic_logger.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/traffic_logger.h"
 
 #include <string>
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 17 matching lines @@
         base::JSONWriter::OPTIONS_PRETTY_PRINT,
         &message);
     DVLOG(1) << "\n" << description << "\n" << message << "\n";
   }
 }
 }  // namespace
 
 void LogClientToServerMessage(const sync_pb::ClientToServerMessage& msg) {
   LogData(msg, &ClientToServerMessageToValue,
           "******Client To Server Message******");
-  // TODO(lipalani) : Store the data (minus specifics)
-  // in a circular buffer in memory.
 }
 
 void LogClientToServerResponse(
     const sync_pb::ClientToServerResponse& response) {
   LogData(response, &ClientToServerResponseToValue,
           "******Server Response******");
-  // TODO(lipalani) : Store the data (minus specifics)
-  // in a circular buffer in memory.
 }
 
 }  // namespace browser_sync