Remove channel ids from various interfaces.

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc b/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
index 7537d8e5fbb9ae292c1d200c278e71193975f2cb..a8db0d293f6d1468b16baa0022703baced769a55 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
@@ -111,14 +111,13 @@ RTPAliveType RTPReceiverVideo::ProcessDeadOrAlive(
 
 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;