Add NetworkAdaptor to dart:io.

tests/standalone/io/network_adaptor_test.dart

Index: tests/standalone/io/network_adaptor_test.dart
diff --git a/tests/language/private_selector_test.dart b/tests/standalone/io/network_adaptor_test.dart
similarity index 63%
copy from tests/language/private_selector_test.dart
copy to tests/standalone/io/network_adaptor_test.dart
index 5d00c940eaccebfa7aad3b869e6d1e5f338a1c0a..94fd29b9119fb6e5fba2dda7fa30c139263bcf9d 100644
--- a/tests/language/private_selector_test.dart
+++ b/tests/standalone/io/network_adaptor_test.dart
@@ -2,14 +2,16 @@
 // 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.
 
-library private_selector_test;
+import 'dart:io';
+
 import "package:expect/expect.dart";
-import 'private_selector_lib.dart';
 
-class B extends A {
+
+void testList() {
+  NetworkAdaptor.list(includeLoopback: false).then((list) => list.forEach(print));
 }
 
-main() {
-  new A().public();
-  Expect.isTrue(executed);
+
+void main() {
+  testList();
 }