Deprecate FLAGS_quic_ack_decimation.

net/quic/quic_connection.cc

 // Copyright (c) 2012 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_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 384 matching lines @@
 
   if (config.HasClientSentConnectionOption(kMTUH, perspective_)) {
     SetMtuDiscoveryTarget(kMtuDiscoveryTargetPacketSizeHigh);
   }
   if (config.HasClientSentConnectionOption(kMTUL, perspective_)) {
     SetMtuDiscoveryTarget(kMtuDiscoveryTargetPacketSizeLow);
   }
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnSetFromConfig(config);
   }
-  if (FLAGS_quic_ack_decimation &&
-      config.HasClientSentConnectionOption(kACKD, perspective_)) {
+  if (config.HasClientSentConnectionOption(kACKD, perspective_)) {
     ack_decimation_enabled_ = true;
   }
 }
 
 void QuicConnection::OnSendConnectionState(
     const CachedNetworkParameters& cached_network_params) {
   if (debug_visitor_ != nullptr) {
     debug_visitor_->OnSendConnectionState(cached_network_params);
   }
 }
@@ skipping 2032 matching lines @@
 void QuicConnection::OnPathClosed(QuicPathId path_id) {
   // Stop receiving packets on this path.
   framer_.OnPathClosed(path_id);
 }
 
 bool QuicConnection::ack_frame_updated() const {
   return received_packet_manager_.ack_frame_updated();
 }
 
 }  // namespace net