pkg/unittest: Add a server for serving test assets to browsers.

lib/src/runner/browser/static/host.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.host;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:html';
 
@@ skipping 66 matching lines @@
     print("$error\n${new Trace.from(stackTrace).terse}");
   });
 }
 
 /// Creates a [MultiChannel] connection to the server, using a [WebSocket] as
 /// the underlying protocol.
 MultiChannel _connectToServer() {
   // The `managerUrl` query parameter contains the WebSocket URL of the remote
   // [BrowserManager] with which this communicates.
   var currentUrl = Uri.parse(window.location.href);
-  var webSocketUrl = currentUrl
-      .resolve(currentUrl.queryParameters['managerUrl'])
-      .replace(scheme: 'ws');
-  var webSocket = new WebSocket(webSocketUrl.toString());
+  var webSocket = new WebSocket(currentUrl.queryParameters['managerUrl']);
 
   var inputController = new StreamController(sync: true);
   webSocket.onMessage.listen(
       (message) => inputController.add(JSON.decode(message.data)));
 
   var outputController = new StreamController(sync: true);
   outputController.stream.listen(
       (message) => webSocket.send(JSON.encode(message)));
 
   return new MultiChannel(inputController.stream, outputController.sink);
@@ skipping 31 matching lines @@
       message.stopPropagation();
       inputController.add(message.data["data"]);
     });
 
     outputController.stream.listen((message) =>
         iframe.contentWindow.postMessage(message, window.location.origin));
   });
 
   return new StreamChannel(inputController.stream, outputController.sink);
 }