WebRtcVoiceMediaChannel::AddRecvStream: Don't call SetRecPayloadType

webrtc/media/engine/webrtcvoiceengine.h

Index: webrtc/media/engine/webrtcvoiceengine.h
diff --git a/webrtc/media/engine/webrtcvoiceengine.h b/webrtc/media/engine/webrtcvoiceengine.h
index c777c6c03e45a0cafd0c39319d404ab9f27e27c9..64f7afabf61dc2b51e9624f5bd545afb70299c10 100644
--- a/webrtc/media/engine/webrtcvoiceengine.h
+++ b/webrtc/media/engine/webrtcvoiceengine.h
@@ -251,7 +251,12 @@ class WebRtcVoiceMediaChannel final : public VoiceMediaChannel,
 
   WebRtcVoiceEngine* const engine_ = nullptr;
   std::vector<AudioCodec> send_codecs_;
+
+  // TODO(kwiberg): decoder_map_ and recv_codecs_ store the exact same
+  // information, in slightly different formats. Eliminate recv_codecs_.
+  std::map<int, webrtc::SdpAudioFormat> decoder_map_;
   std::vector<AudioCodec> recv_codecs_;
+
   int max_send_bitrate_bps_ = 0;
   AudioOptions options_;
   rtc::Optional<int> dtmf_payload_type_;