Reset accept_callback_ before calling it from TCPServerSocket.

net/socket/tcp_server_socket_win.cc

 // Copyright (c) 2011 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/socket/tcp_server_socket_win.h"
 
 #include <mstcpip.h>
 
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
@@ skipping 164 matching lines @@
   WSANETWORKEVENTS ev;
   if (WSAEnumNetworkEvents(socket_, socket_event_, &ev) == SOCKET_ERROR) {
     PLOG(ERROR) << "WSAEnumNetworkEvents()";
     return;
   }
 
   if (ev.lNetworkEvents & FD_ACCEPT) {
     int result = AcceptInternal(accept_socket_);
     if (result != ERR_IO_PENDING) {
       accept_socket_ = NULL;
-      accept_callback_.Run(result);
+      CompletionCallback callback = accept_callback_;
       accept_callback_.Reset();
+      callback.Run(result);
     }
   }
 }
 
 }  // namespace net