Update flags and remove obsolete flags.

net/quic/core/quic_flags_list.h

Index: net/quic/core/quic_flags_list.h
diff --git a/net/quic/core/quic_flags_list.h b/net/quic/core/quic_flags_list.h
index 84d3ce08dd755eace5d7baf18d721250b77f5847..93bea9e1c34114fa7626b5ade0b460d3b8976062 100644
--- a/net/quic/core/quic_flags_list.h
+++ b/net/quic/core/quic_flags_list.h
@@ -7,10 +7,6 @@
 
 // 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)
@@ -60,10 +56,6 @@ QUIC_FLAG(bool, FLAGS_quic_disable_pacing_for_perf_tests, false)
 // 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)
@@ -136,7 +128,7 @@ QUIC_FLAG(bool, FLAGS_quic_enable_app_limited_check, true)
 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.