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

sync/engine/traffic_logger.cc

Index: sync/engine/traffic_logger.cc
diff --git a/sync/engine/traffic_logger.cc b/sync/engine/traffic_logger.cc
index d849e9b11d72c7b6ded86b1f8b501be9c81cf214..1f8ba1d5ed2a40bc4b6682edbeb84fd6cfce69e0 100644
--- a/sync/engine/traffic_logger.cc
+++ b/sync/engine/traffic_logger.cc
@@ -35,16 +35,12 @@ void LogData(const T& data,
 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