Remove channel ids from various interfaces.

webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h

Index: webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h b/webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h
index 9c09f8e43fbe7bee08ce23f9f910ec6af871ac37..a9e85ec450a3f98e30aa8f9270b5c15d3c11865a 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h
+++ b/webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h
@@ -28,7 +28,7 @@ class RTPReceiverStrategy {
  public:
   static RTPReceiverStrategy* CreateVideoStrategy(RtpData* data_callback);
   static RTPReceiverStrategy* CreateAudioStrategy(
-      int32_t id, RtpData* data_callback,
+      RtpData* data_callback,
       RtpAudioFeedback* incoming_messages_callback);
 
   virtual ~RTPReceiverStrategy() {}
@@ -70,7 +70,6 @@ class RTPReceiverStrategy {
   // Invokes the OnInitializeDecoder callback in a media-specific way.
   virtual int32_t InvokeOnInitializeDecoder(
       RtpFeedback* callback,
-      int32_t id,
       int8_t payload_type,
       const char payload_name[RTP_PAYLOAD_NAME_SIZE],
       const PayloadUnion& specific_payload) const = 0;