Remove FlexfecConfig and replace with specific struct in VideoSendStream.

webrtc/media/engine/webrtcvideoengine2.cc

 /*
  *  Copyright (c) 2014 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 1571 matching lines @@
         if (flexfec_enabled) {
           LOG(LS_INFO) << "Multiple FlexFEC streams proposed by remote, but "
                           "our implementation only supports a single FlexFEC "
                           "stream. Will not enable FlexFEC for proposed "
                           "stream with SSRC: "
                        << flexfec_ssrc << ".";
           continue;
         }
 
         flexfec_enabled = true;
-        parameters_.config.rtp.flexfec.flexfec_ssrc = flexfec_ssrc;
+        parameters_.config.rtp.flexfec.ssrc = flexfec_ssrc;
         parameters_.config.rtp.flexfec.protected_media_ssrcs = {primary_ssrc};
       }
     }
   }
 
   parameters_.config.rtp.c_name = sp.cname;
   if (rtp_extensions) {
     parameters_.config.rtp.extensions = *rtp_extensions;
   }
   parameters_.config.rtp.rtcp_mode = send_params.rtcp.reduced_size
@@ skipping 110 matching lines @@
   if (new_encoder.external) {
     webrtc::VideoCodecType type =
         webrtc::PayloadNameToCodecType(codec_settings.codec.name)
             .value_or(webrtc::kVideoCodecUnknown);
     parameters_.config.encoder_settings.internal_source =
         external_encoder_factory_->EncoderTypeHasInternalSource(type);
   } else {
     parameters_.config.encoder_settings.internal_source = false;
   }
   parameters_.config.rtp.ulpfec = codec_settings.ulpfec;
-  parameters_.config.rtp.flexfec.flexfec_payload_type =
+  parameters_.config.rtp.flexfec.payload_type =
       codec_settings.flexfec_payload_type;
 
   // Set RTX payload type if RTX is enabled.
   if (!parameters_.config.rtp.rtx.ssrcs.empty()) {
     if (codec_settings.rtx_payload_type == -1) {
       LOG(LS_WARNING) << "RTX SSRCs configured but there's no configured RTX "
                          "payload type. Ignoring.";
       parameters_.config.rtp.rtx.ssrcs.clear();
     } else {
       parameters_.config.rtp.rtx.payload_type = codec_settings.rtx_payload_type;
@@ skipping 774 matching lines @@
         rtx_mapping[video_codecs[i].codec.id] !=
             ulpfec_config.red_payload_type) {
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket