Remove a QUIC LOG(DFATAL) that validly occurs when two packets are

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 1580 matching lines @@
   // The caller of this function is responsible for checking CanWrite().
   if (packet.serialized_packet.packet == nullptr) {
     LOG(DFATAL)
         << "packet.serialized_packet.packet == nullptr in to SendOrQueuePacket";
     return;
   }
 
   sent_entropy_manager_.RecordPacketEntropyHash(
       packet.serialized_packet.sequence_number,
       packet.serialized_packet.entropy_hash);
-  LOG_IF(DFATAL, !queued_packets_.empty() && !writer_->IsWriteBlocked())
-      << "Packets should only be left queued if we're write blocked.";
   if (!WritePacket(&packet)) {
     queued_packets_.push_back(packet);
   }
 }
 
 void QuicConnection::UpdateStopWaiting(QuicStopWaitingFrame* stop_waiting) {
   stop_waiting->least_unacked = GetLeastUnacked();
   stop_waiting->entropy_hash = sent_entropy_manager_.GetCumulativeEntropy(
       stop_waiting->least_unacked - 1);
 }
@@ skipping 455 matching lines @@
   }
   for (size_t i = 0; i < retransmittable_frames->frames().size(); ++i) {
     if (retransmittable_frames->frames()[i].type == CONNECTION_CLOSE_FRAME) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace net