Report a peer address over IPv4 as IPv4.

tests/standalone/io/socket_info_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 "package:expect/expect.dart";
-import "dart:io";
-
-void testHostAndPort() {
-  ServerSocket.bind("127.0.0.1", 0).then((server) {
-
-    Socket.connect("127.0.0.1", server.port).then((clientSocket) {
-      server.listen((socket) {
-        Expect.equals(socket.port, server.port);
-        Expect.equals(clientSocket.port, socket.remotePort);
-        Expect.equals(clientSocket.remotePort, socket.port);
-        Expect.equals(socket.remoteAddress.address, "127.0.0.1");
-        Expect.equals(clientSocket.remoteAddress.address, "127.0.0.1");
-        socket.destroy();
-        clientSocket.destroy();
-        server.close();
-      });
-    });
-  });
-}
-
-void main() {
-  testHostAndPort();
-}