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

net/http/http_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/http/http_proxy_client_socket.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_util.h"
@@ skipping 225 matching lines @@
 }
 
 int HttpProxyClientSocket::SetReceiveBufferSize(int32_t size) {
   return transport_->socket()->SetReceiveBufferSize(size);
 }
 
 int HttpProxyClientSocket::SetSendBufferSize(int32_t size) {
   return transport_->socket()->SetSendBufferSize(size);
 }
 
+int HttpProxyClientSocket::SetDoNotFragment(bool do_not_fragment) {
+  return transport_->socket()->SetDoNotFragment(do_not_fragment);
+}
+
 int HttpProxyClientSocket::GetPeerAddress(IPEndPoint* address) const {
   return transport_->socket()->GetPeerAddress(address);
 }
 
 int HttpProxyClientSocket::GetLocalAddress(IPEndPoint* address) const {
   return transport_->socket()->GetLocalAddress(address);
 }
 
 int HttpProxyClientSocket::PrepareForAuthRestart() {
   if (!response_.headers.get())
@@ skipping 269 matching lines @@
     next_state_ = STATE_DRAIN_BODY;
     return OK;
   }
 
   return DidDrainBodyForAuthRestart();
 }
 
 //----------------------------------------------------------------
 
 }  // namespace net