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

chrome/renderer/media/cast_transport_sender_ipc.h

Index: chrome/renderer/media/cast_transport_sender_ipc.h
diff --git a/chrome/renderer/media/cast_transport_sender_ipc.h b/chrome/renderer/media/cast_transport_sender_ipc.h
index ef1775320f5ad09e90b14a4b395e49f7e3a58fe3..0e5bb46e449f2f124107d3aa846c815c40ed7a49 100644
--- a/chrome/renderer/media/cast_transport_sender_ipc.h
+++ b/chrome/renderer/media/cast_transport_sender_ipc.h
@@ -48,7 +48,8 @@ class CastTransportSenderIPC
   virtual void ResendPackets(
       bool is_audio,
       const media::cast::transport::MissingFramesAndPacketsMap& missing_packets,
-      bool cancel_rtx_if_not_in_list)
+      bool cancel_rtx_if_not_in_list,
+      base::TimeDelta rtt)
       OVERRIDE;
 
   void OnReceivedPacket(const media::cast::transport::Packet& packet);