Add CHECK() in UdpSocketLibevent to debug crbug.com/452121

net/udp/udp_server_socket.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_server_socket.h"
 
 #include "net/base/net_errors.h"
 #include "net/base/rand_callback.h"
 
 namespace net {
@@ skipping 50 matching lines @@
 }
 
 int UDPServerSocket::SetReceiveBufferSize(int32 size) {
   return socket_.SetReceiveBufferSize(size);
 }
 
 int UDPServerSocket::SetSendBufferSize(int32 size) {
   return socket_.SetSendBufferSize(size);
 }
 
-void UDPServerSocket::Close() {
-  socket_.Close();
+int UDPServerSocket::Close() {
+  return socket_.Close();
 }
 
 int UDPServerSocket::GetPeerAddress(IPEndPoint* address) const {
   return socket_.GetPeerAddress(address);
 }
 
 int UDPServerSocket::GetLocalAddress(IPEndPoint* address) const {
   return socket_.GetLocalAddress(address);
 }
 
@@ skipping 37 matching lines @@
   socket_.DetachFromThread();
 }
 
 #if defined(OS_WIN)
 void UDPServerSocket::UseNonBlockingIO() {
   socket_.UseNonBlockingIO();
 }
 #endif
 
 }  // namespace net