Deprecate FLAGS_quic_change_alarms_efficiently.

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 62 matching lines @@
 
 // If true, re-enables QUIC_VERSION_36.
 QUIC_FLAG(bool, FLAGS_quic_enable_version_36, true)
 
 // If true, enables QUIC_VERSION_36.
 QUIC_FLAG(bool, FLAGS_quic_enable_version_36_v2, true)
 
 // If true, use async codepaths to invoke ProofSource::GetProof.
 QUIC_FLAG(bool, FLAGS_enable_async_get_proof, false)
 
-// If true, QuicAlarm::Update will call a faster UpdateImpl implementation
-// instead of canceling and reregistering the alarm.
-QUIC_FLAG(bool, FLAGS_quic_change_alarms_efficiently, true)
-
 // 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, fix a bug with which QuicStreamSequencerBuffer can\'t release block
 // memory in time.
 QUIC_FLAG(bool, FLAGS_quic_sequencer_buffer_retire_block_in_time, true)
 
 // Remove obsolete code to force QUIC to go forward secure, now that the server
 // immediately goes forward secure.
@@ skipping 60 matching lines @@
 
 // If true, lazy allocate and early release memeory used in
 // QuicStreamSequencerBuffer to buffer incoming data.
 QUIC_FLAG(bool, FLAGS_quic_reduce_sequencer_buffer_memory_life_time, true)
 
 // 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)