[Cast] RTT clean-up to the max!

media/cast/net/cast_transport_sender_impl.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 "media/cast/net/cast_transport_sender_impl.h"
 
 #include "base/single_thread_task_runner.h"
 #include "media/cast/net/cast_transport_config.h"
 #include "media/cast/net/cast_transport_defines.h"
 #include "media/cast/net/udp_transport.h"
@@ skipping 205 matching lines @@
     video_sender_->CancelSendingFrames(frame_ids);
   } else {
     NOTREACHED() << "Invalid request for cancel sending.";
   }
 }
 
 void CastTransportSenderImpl::ResendFrameForKickstart(uint32 ssrc,
                                                       uint32 frame_id) {
   if (audio_sender_ && ssrc == audio_sender_->ssrc()) {
     DCHECK(audio_rtcp_session_);
-    audio_sender_->ResendFrameForKickstart(frame_id,
-                                           audio_rtcp_session_->rtt());
+    audio_sender_->ResendFrameForKickstart(
+        frame_id,
+        audio_rtcp_session_->current_round_trip_time());
   } else if (video_sender_ && ssrc == video_sender_->ssrc()) {
     DCHECK(video_rtcp_session_);
-    video_sender_->ResendFrameForKickstart(frame_id,
-                                           video_rtcp_session_->rtt());
+    video_sender_->ResendFrameForKickstart(
+        frame_id,
+        video_rtcp_session_->current_round_trip_time());
   } else {
     NOTREACHED() << "Invalid request for kickstart.";
   }
 }
 
 void CastTransportSenderImpl::ResendPackets(
     uint32 ssrc,
     const MissingFramesAndPacketsMap& missing_packets,
     bool cancel_rtx_if_not_in_list,
     const DedupInfo& dedup_info) {
@@ skipping 90 matching lines @@
   if (!cast_message_cb.is_null())
     cast_message_cb.Run(cast_message);
 
   DedupInfo dedup_info;
   if (audio_sender_ && audio_sender_->ssrc() == ssrc) {
     const int64 acked_bytes =
         audio_sender_->GetLastByteSentForFrame(cast_message.ack_frame_id);
     last_byte_acked_for_audio_ =
         std::max(acked_bytes, last_byte_acked_for_audio_);
   } else if (video_sender_ && video_sender_->ssrc() == ssrc) {
-    dedup_info.resend_interval = video_rtcp_session_->rtt();
+    dedup_info.resend_interval = video_rtcp_session_->current_round_trip_time();
 
     // Only use audio stream to dedup if there is one.
     if (audio_sender_) {
       dedup_info.last_byte_acked_for_audio = last_byte_acked_for_audio_;
     }
   }
 
   if (cast_message.missing_frames_and_packets.empty())
     return;
 
   // This call does two things.
   // 1. Specifies that retransmissions for packets not listed in the set are
   //    cancelled.
   // 2. Specifies a deduplication window. For video this would be the most
   //    recent RTT. For audio there is no deduplication.
   ResendPackets(ssrc,
                 cast_message.missing_frames_and_packets,
                 true,
                 dedup_info);
 }
 
 }  // namespace cast
 }  // namespace media