relnote: Deprecate FLAGS_quic_dont_ack_acks.

net/quic/quic_flags.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_flags.h"
 
 bool FLAGS_quic_allow_oversized_packets_for_test = false;
 
 // When true, the use time based loss detection instead of nack.
 bool FLAGS_quic_use_time_loss_detection = false;
@@ skipping 27 matching lines @@
 // Maximum number of connections on the time-wait list. A negative value implies
 // no configured limit.
 int64 FLAGS_quic_time_wait_list_max_connections = 50000;
 
 // Enables server-side support for QUIC stateless rejects.
 bool FLAGS_enable_quic_stateless_reject_support = true;
 
 // If true, flow controller may grow the receive window size if necessary.
 bool FLAGS_quic_auto_tune_receive_window = true;
 
-// Don't ack acks in QUIC, even when there is a recent missing packet.
-bool FLAGS_quic_dont_ack_acks = true;
-
 // Enables sending of FEC packet only when FEC alarm goes off.
 bool FLAGS_quic_send_fec_packet_only_on_fec_alarm = true;
 
 // Change from using IsPacketRemovable to IsPacketUseless in
 // QuicUnackedPacketMap.
 bool FLAGS_quic_use_is_useless_packet = true;
 
 // Delay setting QUIC's retransmission alarm until an ack is fully
 // processed or a write is complete.
 bool FLAGS_quic_delay_retransmission_alarm = true;
 
 // Enables server-side path MTU discovery in QUIC.
 bool FLAGS_quic_do_path_mtu_discovery = true;