Deprecate FLAGS_quic_track_single_retransmission.

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"
 
 // When true, the use time based loss detection instead of nack.
 bool FLAGS_quic_use_time_loss_detection = false;
 
 // If true, it will return as soon as an error is detected while validating
@@ skipping 75 matching lines @@
 // structure for QuicStreamSequencer bufferring.
 bool FLAGS_quic_use_stream_sequencer_buffer = true;
 
 // If true, don't send QUIC packets if the send alarm is set.
 bool FLAGS_quic_respect_send_alarm2 = true;
 
 // If ture, sets callback pointer to nullptr after calling Cancel() in
 // QuicCryptoServerStream::CancelOutstandingCallbacks.
 bool FLAGS_quic_set_client_hello_cb_nullptr = true;
 
-// If treu, Only track a single retransmission in QUIC's TransmissionInfo
-// struct.
-bool FLAGS_quic_track_single_retransmission = true;
-
 // If true, allow each quic stream to write 16k blocks rather than doing a round
 // robin of one packet per session when ack clocked or paced.
 bool FLAGS_quic_batch_writes = true;
 
 // If true, QUIC sessions will write block streams that attempt to write
 // unencrypted data.
 bool FLAGS_quic_block_unencrypted_writes = true;
 
 // If true, Close the connection instead of writing unencrypted stream data.
 bool FLAGS_quic_never_write_unencrypted_data = true;
@@ skipping 55 matching lines @@
 // of IV comprise packet path id and lower 7 bytes of packet number.
 bool FLAGS_quic_include_path_id_in_iv = true;
 
 // If true, make sure new incoming streams correctly cede to higher
 // priority (or batch) streams when doing QUIC writes.
 bool FLAGS_quic_cede_correctly = true;
 
 // Has QuicCryptoProof hold a ref to the primary_config instead of storing its
 // SCID.
 bool FLAGS_quic_crypto_proof_use_ref = true;