Add signaling to support ICE renomination.

webrtc/pc/mediasession.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 668 matching lines @@
   return false;
 }
 
 template <class C>
 static bool IsRtxCodec(const C& codec) {
   return stricmp(codec.name.c_str(), kRtxCodecName) == 0;
 }
 
 static TransportOptions GetTransportOptions(const MediaSessionOptions& options,
                                             const std::string& content_name) {
+  TransportOptions transport_options;
   auto it = options.transport_options.find(content_name);
-  if (it == options.transport_options.end()) {
-    return TransportOptions();
+  if (it != options.transport_options.end()) {
+    transport_options = it->second;
   }
-  return it->second;
+  transport_options.enable_ice_renomination = options.enable_ice_renomination;
+  return transport_options;
 }
 
 // Create a media content to be offered in a session-initiate,
 // according to the given options.rtcp_mux, options.is_muc,
 // options.streams, codecs, secure_transport, crypto, and streams.  If we don't
 // currently have crypto (in current_cryptos) and it is enabled (in
 // secure_policy), crypto is created (according to crypto_suites).  If
 // add_legacy_stream is true, and current_streams is empty, a legacy
 // stream is created.  The created content is added to the offer.
 template <class C>
@@ skipping 1454 matching lines @@
       GetFirstMediaContentDescription(sdesc, MEDIA_TYPE_VIDEO));
 }
 
 DataContentDescription* GetFirstDataContentDescription(
     SessionDescription* sdesc) {
   return static_cast<DataContentDescription*>(
       GetFirstMediaContentDescription(sdesc, MEDIA_TYPE_DATA));
 }
 
 }  // namespace cricket