Add convenience HighestPriority and LowestPriority methods to QuicUtils.

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 57 matching lines @@
   // 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"
   // "0x0020:  7fe2 0800 6bcb 0bc6 806e                 ....k....n\n"
   static std::string StringToHexASCIIDump(base::StringPiece in_buffer);
 
   static char* AsChars(unsigned char* data) {
     return reinterpret_cast<char*>(data);
   }
+
+  static QuicPriority LowestPriority();
+
+  static QuicPriority HighestPriority();
 };
 
 // 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_