Deprecate FLAGS_quic_remove_v33_hacks.

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 58 matching lines @@
 QUIC_FLAG(bool, FLAGS_enable_async_get_proof, false)
 
 // If true, requires handshake confirmations for all QUIC handshakes with
 // versions less than 33.
 QUIC_FLAG(bool, FLAGS_quic_require_handshake_confirmation_pre33, false)
 
 // If true, close QUIC connection explicitly on write error due to packet being
 // too large.
 QUIC_FLAG(bool, FLAGS_quic_close_connection_on_packet_too_large, true)
 
-// If true, v33 QUIC client uses 1 bit to specify 8-byte connection id in public
-// flag.
-QUIC_FLAG(bool, FLAGS_quic_remove_v33_hacks, true)
-
 // If true, use the CHLO packet size, not message size when determining how
 // large a REJ can be.
 QUIC_FLAG(bool, FLAGS_quic_use_chlo_packet_size, true)
 
 // If true, defer creation of new connection till its CHLO arrives.
 QUIC_FLAG(bool, FLAGS_quic_buffer_packet_till_chlo, true)
 
 // Deprecate QuicPacketCreator::next_packet_number_length_ because it's no
 // longer necessary.
 QUIC_FLAG(bool, FLAGS_quic_simple_packet_number_length_2, true)
@@ skipping 29 matching lines @@
 
 // If true, allow server address change if it is because of mapped ipv4 address.
 QUIC_FLAG(bool, FLAGS_quic_allow_server_address_change_for_mapped_ipv4, true)
 
 // If true, disables QUIC version less than 34.
 QUIC_FLAG(bool, FLAGS_quic_disable_pre_34, false)
 
 // When true, decode the packet number from the largest received packet, rather
 // than the most recent.
 QUIC_FLAG(bool, FLAGS_quic_packet_numbers_largest_received, true)