Remove lastest_revived_packet from QuicAckFrame since FEC is gone. No functional change expected.

net/quic/quic_sent_packet_manager.cc

 // Copyright 2013 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 "net/quic/quic_sent_packet_manager.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 303 matching lines @@
     }
     // Packet was acked, so remove it from our unacked packet list.
     DVLOG(1) << ENDPOINT << "Got an ack for packet " << packet_number;
     // If data is associated with the most recent transmission of this
     // packet, then inform the caller.
     if (it->in_flight) {
       packets_acked_.push_back(std::make_pair(packet_number, it->bytes_sent));
     }
     MarkPacketHandled(packet_number, &(*it), ack_delay_time);
   }
-
-  // Discard any retransmittable frames associated with revived packets.
-  if (ack_frame.latest_revived_packet != 0) {
-    MarkPacketNotRetransmittable(ack_frame.latest_revived_packet,
-                                 ack_delay_time);
-  }
 }
 
 bool QuicSentPacketManager::HasRetransmittableFrames(
     QuicPacketNumber packet_number) const {
   return unacked_packets_.HasRetransmittableFrames(packet_number);
 }
 
 void QuicSentPacketManager::RetransmitUnackedPackets(
     TransmissionType retransmission_type) {
   DCHECK(retransmission_type == ALL_UNACKED_RETRANSMISSION ||
@@ skipping 634 matching lines @@
 TransmissionInfo* QuicSentPacketManager::GetMutableTransmissionInfo(
     QuicPacketNumber packet_number) {
   return unacked_packets_.GetMutableTransmissionInfo(packet_number);
 }
 
 void QuicSentPacketManager::RemoveObsoletePackets() {
   unacked_packets_.RemoveObsoletePackets();
 }
 
 }  // namespace net