Update from https://crrev.com/304121

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 <string>
+
 #include "net/base/int128.h"
 #include "net/base/net_export.h"
 #include "net/quic/quic_protocol.h"
 
 namespace net {
 
 class NET_EXPORT_PRIVATE QuicUtils {
  public:
   enum Priority {
     LOCAL_PRIORITY,
@@ skipping 41 matching lines @@
 
   // 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);
 
+  // Returns the list of QUIC tags represented by the comma separated
+  // string in |connection_options|.
+  static QuicTagVector ParseQuicConnectionOptions(
+      const std::string& connection_options);
+
   // 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();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicUtils);
 };
 
 // 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_