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

webrtc/video/rtp_stream_receiver.h

 /*
  *  Copyright (c) 2012 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 108 matching lines @@
   // Parses and handles for instance RTX and RED headers.
   // This function assumes that it's being called from only one thread.
   bool ParseAndHandleEncapsulatingHeader(const uint8_t* packet,
                                          size_t packet_length,
                                          const RTPHeader& header);
   void NotifyReceiverOfFecPacket(const RTPHeader& header);
   bool IsPacketInOrder(const RTPHeader& header) const;
   bool IsPacketRetransmitted(const RTPHeader& header, bool in_order) const;
   void UpdateHistograms();
   void EnableReceiveRtpHeaderExtension(const std::string& extension, int id);
+  bool IsRedEnabled() const;
 
   Clock* const clock_;
   // Ownership of this object lies with VideoReceiveStream, which owns |this|.
   const VideoReceiveStream::Config& config_;
   vcm::VideoReceiver* const video_receiver_;
   RemoteBitrateEstimator* const remote_bitrate_estimator_;
   PacketRouter* const packet_router_;
   VieRemb* const remb_;
   ProcessThread* const process_thread_;
 
@@ skipping 10 matching lines @@
   uint8_t restored_packet_[IP_PACKET_SIZE] GUARDED_BY(receive_cs_);
   bool restored_packet_in_use_ GUARDED_BY(receive_cs_);
   int64_t last_packet_log_ms_ GUARDED_BY(receive_cs_);
 
   const std::unique_ptr<RtpRtcp> rtp_rtcp_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_RTP_STREAM_RECEIVER_H_