Add new InternetAddress class with a static lookup function (including IPv6 results).

tests/standalone/io/web_socket_test.dart

Index: tests/standalone/io/web_socket_test.dart
diff --git a/tests/standalone/io/web_socket_test.dart b/tests/standalone/io/web_socket_test.dart
index 2bee0d8670eeb8731762b442adf4840db2b89c82..efe3b0dd5ec30405390e3b2718ad16e290807366 100644
--- a/tests/standalone/io/web_socket_test.dart
+++ b/tests/standalone/io/web_socket_test.dart
@@ -15,7 +15,6 @@ import "dart:typeddata";
 import "dart:uri";
 
 const String CERT_NAME = 'localhost_cert';
-const String SERVER_ADDRESS = '127.0.0.1';
 const String HOST_NAME = 'localhost';
 
 /**
@@ -27,11 +26,11 @@ class SecurityConfiguration {
   SecurityConfiguration({bool this.secure});
 
   Future<HttpServer> createServer({int backlog: 0}) =>
-      secure ? HttpServer.bindSecure(SERVER_ADDRESS,
+      secure ? HttpServer.bindSecure(HOST_NAME,
                                      0,
                                      backlog: backlog,
                                      certificateName: CERT_NAME)
-             : HttpServer.bind(SERVER_ADDRESS,
+             : HttpServer.bind(HOST_NAME,
                                0,
                                backlog);