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

chrome/renderer/media/cast_transport_sender_ipc.h

 // 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.
 
 #ifndef CHROME_RENDERER_MEDIA_CAST_TRANSPORT_SENDER_IPC_H_
 #define CHROME_RENDERER_MEDIA_CAST_TRANSPORT_SENDER_IPC_H_
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "media/cast/logging/logging_defines.h"
@@ skipping 30 matching lines @@
       uint32 packet_type_flags,
       uint32 ntp_seconds,
       uint32 ntp_fraction,
       uint32 rtp_timestamp,
       const media::cast::transport::RtcpDlrrReportBlock& dlrr,
       uint32 sending_ssrc,
       const std::string& c_name) OVERRIDE;
   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 dedupe_window)
       OVERRIDE;
 
   void OnReceivedPacket(const media::cast::transport::Packet& packet);
   void OnNotifyStatusChange(
       media::cast::transport::CastTransportStatus status);
   void OnRawEvents(const std::vector<media::cast::PacketEvent>& packet_events);
 
  private:
   void Send(IPC::Message* message);
 
   int32 channel_id_;
   media::cast::transport::PacketReceiverCallback packet_callback_;
   media::cast::transport::CastTransportStatusCallback status_callback_;
   media::cast::transport::BulkRawEventsCallback raw_events_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(CastTransportSenderIPC);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_TRANSPORT_SENDER_IPC_H_