Fix checked mode errors in InternetAddress test

tests/standalone/io/internet_address_invalid_arguments_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:io';
 
 import "package:expect/expect.dart";
-import "package:async_helper/async_helper.dart";
+
+void testIllegalArguments() {
+  var args = [
+      null, 1, 1.1, new Object(), [], {'a' : '127.0.0.1'},
+      "", "." , ":", ":::"];
+  args.forEach((arg) {
+    Expect.throws(() => new InternetAddress(arg),
+                  (e) => e is ArgumentError);
+  });
+}
 
 void main() {
-  asyncStart();
-  Process.run(Platform.executable,
-              [Platform.script.resolve('print_sync_script.dart').toFilePath()])
-      .then((out) {
-        asyncEnd();
-        Expect.equals(1002, out.stdout.split('\n').length);
-      });
+  testIllegalArguments();
 }