Add .address to [Raw]ServerSocket and HttpServer.

tests/standalone/io/http_server_test.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.
 
 import "dart:async";
 import "dart:io";
 
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
@@ skipping 23 matching lines @@
         if (trace != null) msg += "\nStackTrace: $trace";
         Expect.fail(msg);
       });
   }
 
   // Test two connection after each other.
   asyncStart();
   ServerSocket.bind("127.0.0.1", 0).then((s) {
     socket = s;
     server = new HttpServer.listenOn(socket);
+    Expect.equals(server.address.address, '127.0.0.1');
+    Expect.equals(server.address.host, '127.0.0.1');
     server.listen((HttpRequest request) {
       request.listen(
         (_) {},
         onDone: () => request.response.close());
     });
 
     test(() {
       test(() {
         server.close();
         Expect.throws(() => server.port);
+        Expect.throws(() => server.address);
         socket.close();
         asyncEnd();
       });
     });
   });
 }
 
 void main() {
   testListenOn();
 }