Allow binding the vm service to IPv6 addresses.

runtime/observatory/tests/service/auth_token_test.dart

Index: runtime/observatory/tests/service/auth_token_test.dart
diff --git a/runtime/observatory/tests/service/auth_token_test.dart b/runtime/observatory/tests/service/auth_token_test.dart
index 6d38fcaa310dd89577af4ee17985b72134f304f0..4dfee5982176175dad689bc327e23186381cfc11 100644
--- a/runtime/observatory/tests/service/auth_token_test.dart
+++ b/runtime/observatory/tests/service/auth_token_test.dart
@@ -17,14 +17,14 @@ Future<Null> testeeBefore() async {
   ServiceProtocolInfo info = await Service.controlWebServer(enable: true);
   expect(info.serverUri, isNotNull);
   // Ensure that we have the auth token in the path segments.
-  expect(info.serverUri.pathSegments.length, greaterThan(1));
+  expect(info.serverUri.pathSegments.length, greaterThan(0));

[Cutch, 2016/11/19 22:21:37]

pathSegments has a length two here. so this should be 'equals(2)' or remain
'greaterThan(1)'

[rmacnak, 2016/11/22 04:00:52]

adjusted serverAddress to make this true again

   // Sanity check the length of the auth token.
   expect(info.serverUri.pathSegments[0].length, greaterThan(8));
 
   // Try connecting to the server without the auth token, it should throw
   // an exception.
   var port = info.serverUri.port;
-  var url = Uri.parse('http://127.0.0.1:$port');
+  var url = Uri.parse('http://localhost:$port');
   var httpClient = new io.HttpClient();
   try {
     var request = await httpClient.getUrl(url);