Report correct socket error and use HttpServer:close future in pub.

runtime/bin/socket_patch.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 patch class RawServerSocket  {
   /* patch */ static Future<RawServerSocket> bind(address,
                                                   int port,
                                                   {int backlog: 0,
                                                    bool v6Only: false}) {
     return _RawServerSocket.bind(address, port, backlog, v6Only);
@@ skipping 285 matching lines @@
         })
         .then((address) {
           ensureSocketService();
           var socket = new _NativeSocket.normal();
           socket.address = address;
           var result = socket.nativeCreateConnect(
               address._sockaddr_storage, port);
           if (result is OSError) {
             throw createError(result, "Connection failed", address, port);
           } else {
+            socket.port;  // Query the local port, for error messages.
             var completer = new Completer();
             // Setup handlers for receiving the first write event which
             // indicate that the socket is fully connected.
             socket.setHandlers(
                 write: () {
                   socket.setListening(read: false, write: false);
                   completer.complete(socket);
                 },
                 error: (e) {
                   socket.close();
-                  completer.completeError(
-                      createError(e, "Connection failed", address, port));
+                  completer.completeError(e);
                 }
             );
             socket.setListening(read: false, write: true);
             return completer.future;
           }
         });
   }
 
   static Future<_NativeSocket> bind(host,
                                     int port,
@@ skipping 890 matching lines @@
     if (_detachReady != null) {
       _detachReady.complete(null);
     } else {
       if (_raw != null) {
         _raw.shutdown(SocketDirection.SEND);
         _disableWriteEvent();
       }
     }
   }
 }