Add a SetDoNotFragment() method to DatagramSocket, and call this for

net/udp/udp_client_socket.cc

 // Copyright (c) 2011 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.
 
 #include "net/udp/udp_client_socket.h"
 
 #include "net/base/net_errors.h"
 #include "net/log/net_log.h"
 
 namespace net {
@@ skipping 91 matching lines @@
 }
 
 int UDPClientSocket::SetReceiveBufferSize(int32_t size) {
   return socket_.SetReceiveBufferSize(size);
 }
 
 int UDPClientSocket::SetSendBufferSize(int32_t size) {
   return socket_.SetSendBufferSize(size);
 }
 
+int UDPClientSocket::SetDoNotFragment() {
+  return socket_.SetDoNotFragment();
+}
+
 const BoundNetLog& UDPClientSocket::NetLog() const {
   return socket_.NetLog();
 }
 
 void UDPClientSocket::UseNonBlockingIO() {
 #if defined(OS_WIN)
   socket_.UseNonBlockingIO();
 #endif
 }
 
 }  // namespace net