Add varz to track QUIC packets and bytes sent by transmission type.

net/quic/quic_utils.h

 // 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.
 //
 // Some helpers for quic.
 
 #ifndef NET_QUIC_QUIC_UTILS_H_
 #define NET_QUIC_QUIC_UTILS_H_
 
 #include "net/base/int128.h"
@@ skipping 41 matching lines @@
 
   // Returns the name of the QuicRstStreamErrorCode as a char*
   static const char* StreamErrorToString(QuicRstStreamErrorCode error);
 
   // Returns the name of the QuicErrorCode as a char*
   static const char* ErrorToString(QuicErrorCode error);
 
   // Returns the level of encryption as a char*
   static const char* EncryptionLevelToString(EncryptionLevel level);
 
+  // Returns TransmissionType as a char*
+  static const char* TransmissionTypeToString(TransmissionType type);
+
   // TagToString is a utility function for pretty-printing handshake messages
   // that converts a tag to a string. It will try to maintain the human friendly
   // name if possible (i.e. kABCD -> "ABCD"), or will just treat it as a number
   // if not.
   static std::string TagToString(QuicTag tag);
 
   // Given a binary buffer, return a hex+ASCII dump in the style of
   // tcpdump's -X and -XX options:
   // "0x0000:  0090 69bd 5400 000d 610f 0189 0800 4500  ..i.T...a.....E.\n"
   // "0x0010:  001c fb98 4000 4001 7e18 d8ef 2301 455d  ....@.@.~...#.E]\n"
@@ skipping 12 matching lines @@
 // Utility function that returns an IOVector object wrapped around |str|.
 inline IOVector MakeIOVector(base::StringPiece str) {
   IOVector iov;
   iov.Append(const_cast<char*>(str.data()), str.size());
   return iov;
 }
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_UTILS_H_