Enable parsing of IPv6 form addresse (see rfc2373 and rfc2732).

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 5579e8f65af55110695941528b8a353ba67ccc64..97451374ce112e2a224f856131cfdd9219b095d4 100644
--- a/tests/standalone/io/web_socket_test.dart
+++ b/tests/standalone/io/web_socket_test.dart
@@ -365,7 +365,7 @@ class SecurityConfiguration {
                                onDone: completer.complete);
             });
 
-        futures.add(client.openUrl("GET", new Uri.fromString('${baseHttpUrl}'))
+        futures.add(client.openUrl("GET", Uri.parse('${baseHttpUrl}'))
              .then((request) => request.close())
              .then((response) {
                response.listen((_) { });