Load web tests using the plugin infrastructure.

lib/src/runner/vm/platform.dart

 // Copyright (c) 2016, 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:isolate';
 
 import 'package:path/path.dart' as p;
 import 'package:stream_channel/stream_channel.dart';
 
 import '../../backend/test_platform.dart';
 import '../../util/dart.dart' as dart;
 import '../configuration.dart';
 import '../load_exception.dart';
 import '../plugin/platform.dart';
 
 /// A platform that loads tests in isolates spawned within this Dart process.
 class VMPlatform extends PlatformPlugin {
-  final platforms = [TestPlatform.vm];
-
   /// The test runner configuration.
   final Configuration _config;
 
   VMPlatform(this._config);
 
   StreamChannel loadChannel(String path, TestPlatform platform) {
     assert(platform == TestPlatform.vm);
 
     var isolate;
     var channel = StreamChannelCompleter.fromFuture(() async {
@@ skipping 57 matching lines @@
       } else if (error.message.contains("404 Not Found")) {
         throw new LoadException(path,
             "Error getting $url: 404 Not Found\n"
             'Make sure "pub serve" is serving the test/ directory.');
       }
 
       throw new LoadException(path, error);
     }
   }
 }