Serialize "a=x-google-flag:conference".

pc/webrtcsdp.cc

 /*
  *  Copyright 2011 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 1490 matching lines @@
     AddLine(os.str(), message);
   }
 
   // RFC 5506
   // a=rtcp-rsize
   if (media_desc->rtcp_reduced_size()) {
     InitAttrLine(kAttributeRtcpReducedSize, &os);
     AddLine(os.str(), message);
   }
 
+  if (media_desc->conference_mode()) {
+    InitAttrLine(kAttributeXGoogleFlag, &os);
+    os << kSdpDelimiterColon << kValueConference;
+    AddLine(os.str(), message);
+  }
+
   // RFC 4568
   // a=crypto:<tag> <crypto-suite> <key-params> [<session-params>]
   for (std::vector<CryptoParams>::const_iterator it =
            media_desc->cryptos().begin();
        it != media_desc->cryptos().end(); ++it) {
     InitAttrLine(kAttributeCrypto, &os);
     os << kSdpDelimiterColon << it->tag << " " << it->cipher_suite << " "
        << it->key_params;
     if (!it->session_params.empty()) {
       os << " " << it->session_params;
@@ skipping 1806 matching lines @@
     UpdateCodec<AudioContentDescription, cricket::AudioCodec>(
         media_desc, payload_type, feedback_param);
   } else if (media_type == cricket::MEDIA_TYPE_VIDEO) {
     UpdateCodec<VideoContentDescription, cricket::VideoCodec>(
         media_desc, payload_type, feedback_param);
   }
   return true;
 }
 
 }  // namespace webrtc