Adding IceConfig option to assume TURN/TURN candidate pairs will work.

webrtc/p2p/base/stunport.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 235 matching lines @@
   // prepare STUN candidate.
   if (!server_addresses_.empty()) {
     SendStunBindingRequests();
   } else {
     // Port is done allocating candidates.
     MaybeSetPortCompleteOrError();
   }
 }
 
 Connection* UDPPort::CreateConnection(const Candidate& address,
-                                      CandidateOrigin origin) {
+                                      CandidateOrigin origin,
+                                      const IceConfig& config) {
   if (!SupportsProtocol(address.protocol())) {
     return NULL;
   }
 
   if (!IsCompatibleAddress(address.address())) {
     return NULL;
   }
 
   if (SharedSocket() && Candidates()[0].type() != LOCAL_PORT_TYPE) {
     ASSERT(false);
     return NULL;
   }
 
-  Connection* conn = new ProxyConnection(this, 0, address);
+  Connection* conn = new ProxyConnection(this, 0, address, config);
   AddOrReplaceConnection(conn);
   return conn;
 }
 
 int UDPPort::SendTo(const void* data, size_t size,
                     const rtc::SocketAddress& addr,
                     const rtc::PacketOptions& options,
                     bool payload) {
   int sent = socket_->SendTo(data, size, addr, options);
   if (sent < 0) {
@@ skipping 226 matching lines @@
   const std::vector<Candidate>& existing_candidates = Candidates();
   std::vector<Candidate>::const_iterator it = existing_candidates.begin();
   for (; it != existing_candidates.end(); ++it) {
     if (it->address() == addr)
       return true;
   }
   return false;
 }
 
 }  // namespace cricket