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

net/spdy/spdy_proxy_client_socket.cc

 // 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.
 
 #include "net/spdy/spdy_proxy_client_socket.h"
 
 #include <algorithm>  // min
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 234 matching lines @@
   // is not safe for callers to change this underlying socket.
   return ERR_NOT_IMPLEMENTED;
 }
 
 int SpdyProxyClientSocket::SetSendBufferSize(int32_t size) {
   // Since this StreamSocket sits on top of a shared SpdySession, it
   // is not safe for callers to change this underlying socket.
   return ERR_NOT_IMPLEMENTED;
 }
 
+int SpdyProxyClientSocket::SetDoNotFragment(bool do_not_fragment) {
+  // Since this StreamSocket sits on top of a shared SpdySession, it
+  // is not safe for callers to change this underlying socket.
+  return ERR_NOT_IMPLEMENTED;
+}
+
 int SpdyProxyClientSocket::GetPeerAddress(IPEndPoint* address) const {
   if (!IsConnected())
     return ERR_SOCKET_NOT_CONNECTED;
   return spdy_stream_->GetPeerAddress(address);
 }
 
 int SpdyProxyClientSocket::GetLocalAddress(IPEndPoint* address) const {
   if (!IsConnected())
     return ERR_SOCKET_NOT_CONNECTED;
   return spdy_stream_->GetLocalAddress(address);
@@ skipping 259 matching lines @@
   } else if (!read_callback_.is_null()) {
     // If we have a read_callback_, the we need to make sure we call it back.
     OnDataReceived(std::unique_ptr<SpdyBuffer>());
   }
   // This may have been deleted by read_callback_, so check first.
   if (weak_ptr.get() && !write_callback.is_null())
     write_callback.Run(ERR_CONNECTION_CLOSED);
 }
 
 }  // namespace net