Deprecate FLAGS_quic_always_write_queued_retransmissions.

net/quic/quic_unacked_packet_map.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 "net/quic/quic_unacked_packet_map.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "net/quic/quic_bug_tracker.h"
 #include "net/quic/quic_connection_stats.h"
@@ skipping 73 matching lines @@
     ++least_unacked_;
   }
 }
 
 void QuicUnackedPacketMap::TransferRetransmissionInfo(
     QuicPacketNumber old_packet_number,
     QuicPacketNumber new_packet_number,
     TransmissionType transmission_type,
     TransmissionInfo* info) {
   if (old_packet_number < least_unacked_) {
-    if (!FLAGS_quic_always_write_queued_retransmissions) {
-      QUIC_BUG << "Old TransmissionInfo no longer exists for:"
-               << old_packet_number << " least_unacked:" << least_unacked_;
-    }
     // This can happen when a retransmission packet is queued because of write
     // blocked socket, and the original packet gets acked before the
     // retransmission gets sent.
     return;
   }
   if (old_packet_number > largest_sent_packet_) {
     QUIC_BUG << "Old TransmissionInfo never existed for :" << old_packet_number
              << " largest_sent:" << largest_sent_packet_;
     return;
   }
@@ skipping 243 matching lines @@
     }
   }
   return false;
 }
 
 QuicPacketNumber QuicUnackedPacketMap::GetLeastUnacked() const {
   return least_unacked_;
 }
 
 }  // namespace net