Update the tests to run with Dart 1.13.

test/virtual_host_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 'dart:async';
 import 'dart:io';
 
 import "package:unittest/unittest.dart";
 import "package:http_server/http_server.dart";
 
@@ skipping 48 matching lines @@
           getStatusCode(server.port, '/', host: 'my.host1.com'),
           getStatusCode(server.port, '/', host: 'my.host2.com'),
           getStatusCode(server.port, '/', host: 'my.host3.com')])
           .whenComplete(server.close);
     }), completion(equals([HttpStatus.OK, HttpStatus.OK, HttpStatus.OK])));
   });
 
   test('multiple-source-https', () {
     expect(Future.wait([
         HttpServer.bind('localhost', 0),
-        HttpServer.bindSecure('localhost', 0, certificateName: CERTIFICATE)])
+        HttpServer.bindSecure('localhost', 0, serverContext)])
         .then((servers) {
       var virHost = new VirtualHost();
       virHost.addSource(servers[0]);
       virHost.addSource(servers[1]);
       virHost.unhandled.listen((request) {
         request.response.close();
       });
       return Future.wait([
           getStatusCode(servers[0].port, '/', host: 'myhost1.com'),
           getStatusCode(
@@ skipping 92 matching lines @@
       expect(() => (virHost.addHost('*.host.com')), throwsArgumentError);
       virHost.addHost('my2.host.com');
       virHost.addHost('my3.host.com');
       virHost.addHost('*.com');
       virHost.addHost('*');
       expect(() => (virHost.addHost('*')), throwsArgumentError);
     });
   });
 }