Remove RED/RTX workaround from sender/receiver and VideoEngine2.

webrtc/video_receive_stream.h

 /*
  *  Copyright (c) 2013 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 134 matching lines @@
         uint32_t ssrc = 0;
 
         // Payload type to use for the RTX stream.
         int payload_type = 0;
       };
 
       // Map from video RTP payload type -> RTX config.
       typedef std::map<int, Rtx> RtxMap;
       RtxMap rtx;
 
-      // If set to true, the RTX payload type mapping supplied in |rtx| will be
-      // used when restoring RTX packets. Without it, RTX packets will always be
-      // restored to the last non-RTX packet payload type received.
-      bool use_rtx_payload_mapping_on_restore = false;
-
       // RTP header extensions used for the received stream.
       std::vector<RtpExtension> extensions;
     } rtp;
 
     // Transport for outgoing packets (RTCP).
     Transport* rtcp_send_transport = nullptr;
 
     // Must not be 'nullptr' when the stream is started.
     rtc::VideoSinkInterface<VideoFrame>* renderer = nullptr;
 
@@ skipping 50 matching lines @@
     EnableEncodedFrameRecording(rtc::kInvalidPlatformFileValue, 0);
   }
 
  protected:
   virtual ~VideoReceiveStream() {}
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_RECEIVE_STREAM_H_