Adding CastRemotingSender for media remoting.

media/cast/net/cast_transport_config.h

Index: media/cast/net/cast_transport_config.h
diff --git a/media/cast/net/cast_transport_config.h b/media/cast/net/cast_transport_config.h
index 3ba95dce590c78cbbdbaf7c2deaecdd18182314d..abace7f8ca8e76a58714a18920b57519518ff00f 100644
--- a/media/cast/net/cast_transport_config.h
+++ b/media/cast/net/cast_transport_config.h
@@ -24,10 +24,12 @@ enum Codec {
   CODEC_AUDIO_OPUS,
   CODEC_AUDIO_PCM16,
   CODEC_AUDIO_AAC,
+  CODEC_AUDIO_REMOTE,
   CODEC_VIDEO_FAKE,
   CODEC_VIDEO_VP8,
   CODEC_VIDEO_H264,
-  CODEC_LAST = CODEC_VIDEO_H264
+  CODEC_VIDEO_REMOTE,
+  CODEC_LAST = CODEC_VIDEO_REMOTE
 };
 
 // Describes the content being transported over RTP streams.
@@ -63,6 +65,9 @@ struct CastTransportRtpConfig {
   CastTransportRtpConfig();
   ~CastTransportRtpConfig();
 
+  // Identifier for the RTP stream.
+  int32_t rtp_stream_id;
+
   // Identifier refering to this sender.
   uint32_t ssrc;