Deprecate FLAGS_quic_do_not_send_ack_on_emsgsize.

net/quic/core/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/core/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 1768 matching lines @@
   const string error_details = "Write failed with error: " +
                                base::IntToString(error_code) + " (" +
                                ErrorToString(error_code) + ")";
   DVLOG(1) << ENDPOINT << error_details;
   // We can't send an error as the socket is presumably borked.
   switch (error_code) {
     case kMessageTooBigErrorCode:
       if (FLAGS_quic_close_connection_on_packet_too_large) {  // NOLINT
         CloseConnection(
             QUIC_PACKET_WRITE_ERROR, error_details,
-            FLAGS_quic_do_not_send_ack_on_emsgsize
-                ? ConnectionCloseBehavior::
-                      SEND_CONNECTION_CLOSE_PACKET_WITH_NO_ACK
-                : ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
+            ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET_WITH_NO_ACK);
         break;
       }
     default:
       // We can't send an error as the socket is presumably borked.
       TearDownLocalConnectionState(QUIC_PACKET_WRITE_ERROR, error_details,
                                    ConnectionCloseSource::FROM_SELF);
   }
 }
 
 void QuicConnection::OnSerializedPacket(SerializedPacket* serialized_packet) {
@@ skipping 736 matching lines @@
 
 void QuicConnection::CheckIfApplicationLimited() {
   if (queued_packets_.empty() &&
       !sent_packet_manager_->HasPendingRetransmissions() &&
       !visitor_->WillingAndAbleToWrite()) {
     sent_packet_manager_->OnApplicationLimited();
   }
 }
 
 }  // namespace net