Log the quic version for internal server tracing. Not used in production.

net/quic/quic_connection_logger.h

 // Copyright (c) 2013 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.
 
 #ifndef NET_QUIC_QUIC_CONNECTION_LOGGER_H_
 #define NET_QUIC_QUIC_CONNECTION_LOGGER_H_
 
 #include <bitset>
 
 #include "net/base/ip_endpoint.h"
@@ skipping 50 matching lines @@
   virtual void OnBlockedFrame(const QuicBlockedFrame& frame) OVERRIDE;
   virtual void OnGoAwayFrame(const QuicGoAwayFrame& frame) OVERRIDE;
   virtual void OnPingFrame(const QuicPingFrame& frame) OVERRIDE;
   virtual void OnPublicResetPacket(
       const QuicPublicResetPacket& packet) OVERRIDE;
   virtual void OnVersionNegotiationPacket(
       const QuicVersionNegotiationPacket& packet) OVERRIDE;
   virtual void OnRevivedPacket(const QuicPacketHeader& revived_header,
                                base::StringPiece payload) OVERRIDE;
   virtual void OnConnectionClosed(QuicErrorCode error, bool from_peer) OVERRIDE;
+  virtual void OnSuccessfulVersionNegotiation(
+      const QuicVersion& version) OVERRIDE;
 
   void OnCryptoHandshakeMessageReceived(
       const CryptoHandshakeMessage& message);
   void OnCryptoHandshakeMessageSent(
       const CryptoHandshakeMessage& message);
-  void OnSuccessfulVersionNegotiation(const QuicVersion& version);
   void UpdateReceivedFrameCounts(QuicStreamId stream_id,
                                  int num_frames_received,
                                  int num_duplicate_frames_received);
   void OnCertificateVerified(const CertVerifyResult& result);
 
  private:
   // Do a factory get for a histogram for recording data, about individual
   // packet sequence numbers, that was gathered in the vectors
   // received_packets_ and received_acks_. |statistic_name| identifies which
   // element of data is recorded, and is used to form the histogram name.
@@ skipping 74 matching lines @@
   // The available type of connection (WiFi, 3G, etc.) when connection was first
   // used.
   const char* const connection_description_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnectionLogger);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_LOGGER_H_