Cast: Avoid retransmit if we sent the same packet recently (less than RTT)

media/cast/transport/rtp_sender/rtp_sender.cc

Index: media/cast/transport/rtp_sender/rtp_sender.cc
diff --git a/media/cast/transport/rtp_sender/rtp_sender.cc b/media/cast/transport/rtp_sender/rtp_sender.cc
index 2604d253de4e3f295163c8f29f9fe78a56445494..20d91cd87f9939d33635e7f11ac080c35f319d0c 100644
--- a/media/cast/transport/rtp_sender/rtp_sender.cc
+++ b/media/cast/transport/rtp_sender/rtp_sender.cc
@@ -75,7 +75,8 @@ void RtpSender::SendFrame(const EncodedFrame& frame) {
 
 void RtpSender::ResendPackets(
     const MissingFramesAndPacketsMap& missing_frames_and_packets,
-    bool cancel_rtx_if_not_in_list) {
+    bool cancel_rtx_if_not_in_list,
+    base::TimeDelta rtt) {
   DCHECK(storage_);
   // Iterate over all frames in the list.
   for (MissingFramesAndPacketsMap::const_iterator it =
@@ -129,7 +130,7 @@ void RtpSender::ResendPackets(
         transport_->CancelSendingPacket(it->first);
       }
     }
-    transport_->ResendPackets(packets_to_resend);
+    transport_->ResendPackets(packets_to_resend, rtt);
   }
 }