Log error code for write errors in QuicConnection.

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 1726 matching lines @@
     return true;
   }
 
   if (result.status == WRITE_STATUS_ERROR) {
     OnWriteError(result.error_code);
     DLOG(ERROR) << ENDPOINT << "failed writing " << encrypted_length
                 << " bytes "
                 << " from host " << (self_address().address().empty()
                                          ? " empty address "
                                          : self_address().ToStringWithoutPort())
-                << " to address " << peer_address().ToString();
+                << " to address " << peer_address().ToString()
+                << " with error code " << result.error_code;
     return false;
   }
 
   return true;
 }
 
 bool QuicConnection::ShouldDiscardPacket(const SerializedPacket& packet) {
   if (!connected_) {
     DVLOG(1) << ENDPOINT << "Not sending packet as connection is disconnected.";
     return true;
@@ skipping 801 matching lines @@
 
 void QuicConnection::CheckIfApplicationLimited() {
   if (queued_packets_.empty() &&
       !sent_packet_manager_->HasPendingRetransmissions() &&
       !visitor_->WillingAndAbleToWrite()) {
     sent_packet_manager_->OnApplicationLimited();
   }
 }
 
 }  // namespace net