Deprecate FLAGS_quic_only_track_sent_packets.

net/quic/core/quic_flags_list.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.
 
 // This file intentionally does not have header guards, it's included
 // inside a macro to generate values.
 
 // This file contains the list of QUIC protocol flags.
 
 // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC
@@ skipping 64 matching lines @@
 // If true, disables QUIC version less than 34.
 QUIC_FLAG(bool, FLAGS_quic_disable_pre_34, true)
 
 // Only close the connection on the 5th RTO client side when the 5RTO option
 // is enabled.
 QUIC_FLAG(bool, FLAGS_quic_only_5rto_client_side, true)
 
 // If true, QUIC server push will enabled by default.
 QUIC_FLAG(bool, FLAGS_quic_enable_server_push_by_default, true)
 
-// Only inform the QuicSentPacketManager of packets that were sent,
-// not those that we tried to send.
-QUIC_FLAG(bool, FLAGS_quic_only_track_sent_packets, true)
-
 // If true, export reject reasons for all rejects, i.e., rejects,
 // stateless rejects and cheap stateless rejects.
 QUIC_FLAG(bool, FLAGS_quic_export_rej_for_all_rejects, true)
 
 // Allow large send deltas to be used as RTT samples.
 QUIC_FLAG(bool, FLAGS_quic_allow_large_send_deltas, true)
 
 // Engage early retransmit anytime the largest acked is greater than
 // or equal to the largest retransmittable packet.
 QUIC_FLAG(bool, FLAGS_quic_largest_sent_retransmittable, true)
@@ skipping 52 matching lines @@
 // If enabled, fix double call of
 // InsertLocallyClosedStreamsHighestOffset in ResetPromised.
 QUIC_FLAG(bool, FLAGS_quic_bugfix_reset_promised, true)
 
 // Set the retransmission alarm only when there are unacked
 // retransmittable packets.
 QUIC_FLAG(bool, FLAGS_quic_more_conservative_retransmission_alarm, true)
 
 // Enable QUIC force HOL blocking experiment.
 QUIC_FLAG(bool, FLAGS_quic_enable_force_hol_blocking, true)