Always use NonBlocking IO for UDP sockets on Windows.

net/quic/chromium/quic_stream_factory.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/chromium/quic_stream_factory.h"
 
 #include <algorithm>
 #include <tuple>
 #include <utility>
 
@@ skipping 1404 matching lines @@
 }
 
 bool QuicStreamFactory::HasActiveCertVerifierJob(
     const QuicServerId& server_id) const {
   return base::ContainsKey(active_cert_verifier_jobs_, server_id);
 }
 
 int QuicStreamFactory::ConfigureSocket(DatagramClientSocket* socket,
                                        IPEndPoint addr,
                                        NetworkHandle network) {
-  socket->UseNonBlockingIO();
-
   int rv;
   if (migrate_sessions_on_network_change_) {
     // If caller leaves network unspecified, use current default network.
     if (network == NetworkChangeNotifier::kInvalidNetworkHandle) {
       rv = socket->ConnectUsingDefaultNetwork(addr);
     } else {
       rv = socket->ConnectUsingNetwork(network, addr);
     }
   } else {
     rv = socket->Connect(addr);
@@ skipping 295 matching lines @@
   // Since the session was active, there's no longer an
   // HttpStreamFactoryImpl::Job running which can mark it broken, unless the TCP
   // job also fails. So to avoid not using QUIC when we otherwise could, we mark
   // it as recently broken, which means that 0-RTT will be disabled but we'll
   // still race.
   http_server_properties_->MarkAlternativeServiceRecentlyBroken(
       alternative_service);
 }
 
 }  // namespace net