Remove FLAGS_quic_allow_silent_close.

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 273 matching lines @@
        it != queued_packets_.end(); ++it) {
     delete it->serialized_packet.retransmittable_frames;
     delete it->serialized_packet.packet;
   }
 }
 
 void QuicConnection::SetFromConfig(const QuicConfig& config) {
   if (config.negotiated()) {
     SetNetworkTimeouts(QuicTime::Delta::Infinite(),
                        config.IdleConnectionStateLifetime());
-    if (FLAGS_quic_allow_silent_close && config.SilentClose()) {
+    if (config.SilentClose()) {
       silent_close_enabled_ = true;
     }
   } else {
     SetNetworkTimeouts(config.max_time_before_crypto_handshake(),
                        config.max_idle_time_before_crypto_handshake());
   }
 
   sent_packet_manager_.SetFromConfig(config);
   if (config.HasReceivedBytesForConnectionId() &&
       can_truncate_connection_ids_) {
@@ skipping 1796 matching lines @@
   }
   for (const QuicFrame& frame : retransmittable_frames->frames()) {
     if (frame.type == CONNECTION_CLOSE_FRAME) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace net