Add a testOn parameter to test() and group().

lib/src/runner/browser/browser_manager.dart

 // Copyright (c) 2015, 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.
 
 library unittest.runner.browser.browser_manager;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:http_parser/http_parser.dart';
 
+import '../../backend/metadata.dart';
 import '../../backend/suite.dart';
 import '../../util/multi_channel.dart';
 import '../../util/remote_exception.dart';
 import '../../utils.dart';
 import '../load_exception.dart';
 import 'iframe_test.dart';
 
 /// A class that manages the connection to a single running browser.
 ///
 /// This is in charge of telling the browser which test suites to load and
@@ skipping 31 matching lines @@
       if (response["type"] == "loadException") {
         return new Future.error(new LoadException(path, response["message"]));
       } else if (response["type"] == "error") {
         var asyncError = RemoteException.deserialize(response["error"]);
         return new Future.error(
             new LoadException(path, asyncError.error),
             asyncError.stackTrace);
       }
 
       return new Suite(response["tests"].map((test) {
+        var metadata = new Metadata.deserialize(test['metadata']);
         var testChannel = suiteChannel.virtualChannel(test['channel']);
-        return new IframeTest(test['name'], testChannel);
+        return new IframeTest(test['name'], metadata, testChannel);
       }), path: path, platform: "Chrome");
     });
   }
 }