Remove channel ids from various interfaces.

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc

 /*
  *  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 93 matching lines @@
   return kVideoPayloadTypeFrequency;
 }
 
 RTPAliveType RTPReceiverVideo::ProcessDeadOrAlive(
     uint16_t last_payload_length) const {
   return kRtpDead;
 }
 
 int32_t RTPReceiverVideo::InvokeOnInitializeDecoder(
     RtpFeedback* callback,
-    int32_t id,
     int8_t payload_type,
     const char payload_name[RTP_PAYLOAD_NAME_SIZE],
     const PayloadUnion& specific_payload) const {
   // For video we just go with default values.
   if (-1 ==
-      callback->OnInitializeDecoder(
-          id, payload_type, payload_name, kVideoPayloadTypeFrequency, 1, 0)) {
+      callback->OnInitializeDecoder(payload_type, payload_name,
+                                    kVideoPayloadTypeFrequency, 1, 0)) {
     LOG(LS_ERROR) << "Failed to created decoder for payload type: "
                   << static_cast<int>(payload_type);
     return -1;
   }
   return 0;
 }
 
 }  // namespace webrtc