Allow server sockets to rebind to same port if there is nothing actively listening on that port.

net/socket/tcp_server_socket_win.h

Index: net/socket/tcp_server_socket_win.h
diff --git a/net/socket/tcp_server_socket_win.h b/net/socket/tcp_server_socket_win.h
index a7ab78cd4e9dc51c7dc399675722d2189f31a6fe..ce5824245873c91c397bd9e514beb71fceb389f6 100644
--- a/net/socket/tcp_server_socket_win.h
+++ b/net/socket/tcp_server_socket_win.h
@@ -34,10 +34,16 @@ class NET_EXPORT_PRIVATE TCPServerSocketWin
   virtual int Accept(scoped_ptr<StreamSocket>* socket,
                      const CompletionCallback& callback);
 
+  // Sets corresponding flags to allow the socket to share the local address to
+  // which the socket will be bound with other processes. Should be called
+  // before Bind().
+  void AllowAddressReuse();
+
   // base::ObjectWatcher::Delegate implementation.
   virtual void OnObjectSignaled(HANDLE object);
 
  private:
+  int SetSocketOptions();
   int AcceptInternal(scoped_ptr<StreamSocket>* socket);
   void Close();
 
@@ -49,6 +55,8 @@ class NET_EXPORT_PRIVATE TCPServerSocketWin
   scoped_ptr<StreamSocket>* accept_socket_;
   CompletionCallback accept_callback_;
 
+  bool reuse_address_;
+
   BoundNetLog net_log_;
 };