Make browser tests all run from a server instead of the local filesystem.

samples/swarm/SwarmApp.dart

 // Copyright (c) 2011, 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.
 
 part of swarmlib;
 
 /**
  * A simple news reader in Dart.
  */
 class Swarm extends App {
   /**
    * Flag to insure the onLoad isn't called when callback from initializeFromUrl
    * could occur before the document's onload event.
    */
   bool onLoadFired;
 
   /** Collections of datafeeds to show per page. */
   Sections sections;
 
   /** The front page of the app. */
   FrontView frontView;
 
   /** Observable UI state. */
   SwarmState state;
 
-  Swarm() : super(), onLoadFired = false {
-    Sections.initializeFromUrl((currSections) {
+  Swarm({bool useCannedData : false}) : super(), onLoadFired = false {
+    Sections.initializeFromUrl(useCannedData, (currSections) {
       sections = currSections;
       state = new SwarmState(sections);
       setupApp();
     });
     // Catch user keypresses and decide whether to use them for the
     // Streams app or pass them on to the browser.
     document.on.keyUp.add((e) {
       if (frontView != null) {
         frontView.processKeyEvent(e);
       }
@@ skipping 42 matching lines @@
       refresh();
       eraseSplashScreen();
     }
   }
 
   void render() {
     frontView = new FrontView(this);
     frontView.addToDocument(document.body);
   }
 }