Update flags and remove obsolete flags.

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, it will return as soon as an error is detected while validating
-// CHLO.
-QUIC_FLAG(bool, FLAGS_use_early_return_when_verifying_chlo, true)
-
 // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC
 // connection options.
 QUIC_FLAG(bool, FLAGS_quic_allow_bbr, false)
 
 // Time period for which a given connection_id should live in the time-wait
 // state.
 QUIC_FLAG(int64_t, FLAGS_quic_time_wait_list_seconds, 200)
 
 // Currently, this number is quite conservative.  The max QPS limit for an
 // individual server silo is currently set to 1000 qps, though the actual max
@@ skipping 29 matching lines @@
 // Net.QuicSession.HeadersHOLBlockedTime.
 QUIC_FLAG(bool, FLAGS_quic_measure_headers_hol_blocking_time, true)
 
 // If true, disable pacing in QUIC.
 QUIC_FLAG(bool, FLAGS_quic_disable_pacing_for_perf_tests, false)
 
 // If true, QUIC connections can do bandwidth resumption with an initial window
 // of < 10 packets.
 QUIC_FLAG(bool, FLAGS_quic_no_lower_bw_resumption_limit, true)
 
-// Only set one alarm for sending at once, either the send alarm or
-// retransmission alarm.  Disabled because it breaks QUIC time loss detection.
-QUIC_FLAG(bool, FLAGS_quic_only_one_sending_alarm, false)
-
 // If true, QUIC public reset packets will have the \"pre-v33\" public header
 // flags.
 QUIC_FLAG(bool, FLAGS_quic_use_old_public_reset_packets, true)
 
 // If true, QUIC will use cheap stateless rejects without creating a full
 // connection.
 QUIC_FLAG(bool, FLAGS_quic_use_cheap_stateless_rejects, false)
 
 // If true, QUIC respect HTTP2 SETTINGS frame rather than always close the
 // connection.
@@ skipping 52 matching lines @@
 
 // If true, the connection will check whether it is application-limited, and
 // notify the congestion controller about it.
 QUIC_FLAG(bool, FLAGS_quic_enable_app_limited_check, true)
 
 // Deprecate QuicPacketCreator::next_packet_number_length_ because it's no
 // longer necessary.
 QUIC_FLAG(bool, FLAGS_quic_simple_packet_number_length_2, true)
 
 // If true, disables QUIC version less than 32.
-QUIC_FLAG(bool, FLAGS_quic_disable_pre_32, false)
+QUIC_FLAG(bool, FLAGS_quic_disable_pre_32, true)
 
 // If true, QUIC will enforce the MTU limit for connections that may require a
 // small MTU.
 QUIC_FLAG(bool, FLAGS_quic_enforce_mtu_limit, false)
 
 // Disable MTU probing if MTU probe causes ERR_MSG_TOO_BIG instead of aborting
 // the connection.
 QUIC_FLAG(bool, FLAGS_graceful_emsgsize_on_mtu_probe, true)
 
 // If true, do not force sending ack when connection is closed because of
@@ skipping 12 matching lines @@
 // skew.
 QUIC_FLAG(bool, FLAGS_quic_send_scfg_ttl, true)
 
 // If true, only open limited number of quic sessions per epoll event. Leave the
 // rest to next event. This flag can be turned on only if
 // --quic_buffer_packet_till_chlo is true.
 QUIC_FLAG(bool, FLAGS_quic_limit_num_new_sessions_per_epoll_loop, false)
 
 // If true, disables QUIC version less than 34.
 QUIC_FLAG(bool, FLAGS_quic_disable_pre_34, false)