Cast: Refactor RTCP handling

media/cast/cast_config.h

Index: media/cast/cast_config.h
diff --git a/media/cast/cast_config.h b/media/cast/cast_config.h
index c2e797b63a939985b08a98c7690ed061bd46321a..c2d8db35f0dd1a59856e8b24f67abe59228f2ef4 100644
--- a/media/cast/cast_config.h
+++ b/media/cast/cast_config.h
@@ -37,7 +37,6 @@ struct AudioSenderConfig {
 
   int rtcp_interval;
   std::string rtcp_c_name;
-  RtcpMode rtcp_mode;
 
   // The total amount of time between a frame's capture/recording on the sender
   // and its playback on the receiver (i.e., shown to a user).  This is fixed as
@@ -75,7 +74,6 @@ struct VideoSenderConfig {
 
   int rtcp_interval;
   std::string rtcp_c_name;
-  RtcpMode rtcp_mode;
 
   // The total amount of time between a frame's capture/recording on the sender
   // and its playback on the receiver (i.e., shown to a user).  This is fixed as
@@ -130,10 +128,6 @@ struct FrameReceiverConfig {
   // the transport layer).
   std::string rtcp_c_name;
 
-  // Determines amount of detail in RTCP reports.
-  // TODO(miu): Remove this since it's never anything but kRtcpReducedSize.
-  RtcpMode rtcp_mode;
-
   // The total amount of time between a frame's capture/recording on the sender
   // and its playback on the receiver (i.e., shown to a user).  This is fixed as
   // a value large enough to give the system sufficient time to encode,