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

chrome/renderer/media/cast_transport_sender_ipc.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/media/cast_transport_sender_ipc.h"
 
 #include "base/callback.h"
 #include "base/id_map.h"
 #include "chrome/common/cast_messages.h"
 #include "chrome/renderer/media/cast_ipc_dispatcher.h"
@@ skipping 61 matching lines @@
   data.rtp_timestamp = rtp_timestamp;
   Send(new CastHostMsg_SendRtcpFromRtpSender(
       channel_id_,
       data,
       dlrr));
 }
 
 void CastTransportSenderIPC::ResendPackets(
     bool is_audio,
     const media::cast::MissingFramesAndPacketsMap& missing_packets,
-    bool cancel_rtx_if_not_in_list) {
+    bool cancel_rtx_if_not_in_list,
+    base::TimeDelta dedupe_window) {
   Send(new CastHostMsg_ResendPackets(channel_id_,
                                      is_audio,
                                      missing_packets,
-                                     cancel_rtx_if_not_in_list));
+                                     cancel_rtx_if_not_in_list,
+                                     dedupe_window));
 }
 
 void CastTransportSenderIPC::OnReceivedPacket(
     const media::cast::Packet& packet) {
   if (!packet_callback_.is_null()) {
     // TODO(hubbe): Perhaps an non-ownership-transferring cb here?
     scoped_ptr<media::cast::transport::Packet> packet_copy(
         new media::cast::transport::Packet(packet));
     packet_callback_.Run(packet_copy.Pass());
   } else {
@@ skipping 11 matching lines @@
   raw_events_callback_.Run(packet_events);
 }
 
 void CastTransportSenderIPC::Send(IPC::Message* message) {
   if (CastIPCDispatcher::Get()) {
     CastIPCDispatcher::Get()->Send(message);
   } else {
     delete message;
   }
 }