Bind before sandbox lockdown on Windows.

net/udp/udp_socket_libevent.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/udp/udp_socket_libevent.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <netdb.h>
 #include <net/if.h>
@@ skipping 749 matching lines @@
   } else {
     rv = setsockopt(socket_, IPPROTO_IPV6, IPV6_TCLASS,
                     &dscp_and_ecn, sizeof(dscp_and_ecn));
   }
   if (rv < 0)
     return MapSystemError(errno);
 
   return OK;
 }
 
+void UDPSocketLibevent::DetachFromThread() {
+  base::NonThreadSafe::DetachFromThread();
+}
+
 }  // namespace net