Cast: Move retransmission to the transport

media/cast/net/rtp/rtp_sender.h

Index: media/cast/net/rtp/rtp_sender.h
diff --git a/media/cast/net/rtp/rtp_sender.h b/media/cast/net/rtp/rtp_sender.h
index 4dd7966a680015931bebca0622b4d59b097e4d08..f3a551ab4597189a7ac07df177d0797a8f4cb19e 100644
--- a/media/cast/net/rtp/rtp_sender.h
+++ b/media/cast/net/rtp/rtp_sender.h
@@ -48,6 +48,10 @@ class RtpSender {
                      bool cancel_rtx_if_not_in_list,
                      base::TimeDelta dedupe_window);
 
+  void CancelSendingFrames(const std::vector<uint32>& frame_ids);
+
+  void ResendFrameForKickstart(uint32 frame_id, base::TimeDelta dedupe_window);
+
   size_t send_packet_count() const {
     return packetizer_ ? packetizer_->send_packet_count() : 0;
   }