[Cast] Clean-up: Merge AudioReceiverConfig+VideoReceiverConfig-->FrameReceiverConfig.

media/cast/rtp_receiver/rtp_receiver.cc

Index: media/cast/rtp_receiver/rtp_receiver.cc
diff --git a/media/cast/rtp_receiver/rtp_receiver.cc b/media/cast/rtp_receiver/rtp_receiver.cc
index 2f95bf3b6679071e51d3294397159df530bbf013..f7ff50b3752d5dab9f3fdfd6770e48df9b172f25 100644
--- a/media/cast/rtp_receiver/rtp_receiver.cc
+++ b/media/cast/rtp_receiver/rtp_receiver.cc
@@ -14,8 +14,8 @@ namespace media {
 namespace cast {
 
 RtpReceiver::RtpReceiver(base::TickClock* clock,
-                         const AudioReceiverConfig* audio_config,
-                         const VideoReceiverConfig* video_config) :
+                         const FrameReceiverConfig* audio_config,
+                         const FrameReceiverConfig* video_config) :
     packet_parser_(audio_config ? audio_config->incoming_ssrc :
                    (video_config ? video_config->incoming_ssrc : 0),
                    audio_config ? audio_config->rtp_payload_type :