Update from https://crrev.com/312398

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"
 
 bool FLAGS_quic_allow_oversized_packets_for_test = false;
 
 // 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
 // CHLO.
 bool FLAGS_use_early_return_when_verifying_chlo = true;
 
-// If true, QUIC crypto reject message will include the reasons for rejection.
-bool FLAGS_send_quic_crypto_reject_reason = false;
-
 // If true, QUIC connections will support FEC protection of data while sending
 // packets, to reduce latency of data delivery to the application. The client
 // must also request FEC protection for the server to use FEC.
 bool FLAGS_enable_quic_fec = false;
 
 // When true, defaults to BBR congestion control instead of Cubic.
 bool FLAGS_quic_use_bbr_congestion_control = false;
 
 // If true, QUIC BBR congestion control may be enabled via Finch and/or via QUIC
 // connection options.
@@ skipping 14 matching lines @@
 // controlled by QUIC connection options in the config or by enabling BBR
 // congestion control.
 bool FLAGS_quic_enable_pacing = false;
 
 // If true, the silent close option will be honored.
 bool FLAGS_quic_allow_silent_close = true;
 
 // If true, use std::cbrt instead of custom cube root.
 bool FLAGS_quic_use_std_cbrt = true;
 
-// If true, the QUIC packet generator will not attempt to queue multiple ACK
-// frames.
-bool FLAGS_quic_disallow_multiple_pending_ack_frames = true;
-
 // If true, then the source address tokens generated for QUIC connects will
 // store multiple addresses.
 bool FLAGS_quic_use_multiple_address_in_source_tokens = false;
 
-// If true, an attempt to send an empty data string with no FIN will return
-// early, and not create a frame.
-bool FLAGS_quic_empty_data_no_fin_early_return = true;
-
 // If true, if min RTT and/or SRTT have not yet been set then initial RTT is
 // used to initialize them in a call to QuicConnection::GetStats.
 bool FLAGS_quic_use_initial_rtt_for_stats = true;
 
 // If true, uses the last sent packet for the RTO timer instead of the earliest.
 bool FLAGS_quic_rto_uses_last_sent = true;
 
 // If true, attach QuicAckNotifiers to packets rather than individual stream
 // frames.
 bool FLAGS_quic_attach_ack_notifiers_to_packets = true;
+
+// If true, the AckNotifierManager is informed about new packets as soon as they
+// are serialized.
+bool FLAGS_quic_ack_notifier_informed_on_serialized = true;
+
+// If true, QUIC will use the new RTO that waits until an ack arrives to adjust
+// the congestion window.
+bool FLAGS_quic_use_new_rto = true;
+
+// Time period for which a given connection_id should live in the time-wait
+// state.
+int64 FLAGS_quic_time_wait_list_seconds = 5;
+
+// 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
+// that we see in the wild is closer to 450 qps. Regardless, this means that the
+// longest time-wait list we should see is 5 seconds * 1000 qps = 5000.  If we
+// allow for an order of magnitude leeway, we have 50000.
+//
+// Maximum number of connections on the time-wait list. A negative value implies
+// no configured limit.
+int64 FLAGS_quic_time_wait_list_max_connections = 50000;
+
+// If true, limit the number of connections on the quic time-wait list using a
+// flag.
+bool FLAGS_quic_limit_time_wait_list_size = true;