Changes to run Swarm from the Editor and to suppress warnings.

samples/swarm/SwarmViews.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.
 
 // TODO(jacobr): there is a lot of dead code in this class. Checking is as is
 // and then doing a large pass to remove functionality that doesn't make sense
 // given the UI layout.
 
 /**
  * Front page of Swarm.
@@ skipping 217 matching lines @@
     }
   }
 
   /**
    * Called when the user chooses a section on the SliderMenu.  Hides
    * all views except the one they want to see.
    */
   void _onSectionSelected(String sectionTitle) {
     final section = swarm.sections.findSection(sectionTitle);
     // Find the view for this section.
-    for (final view in sections.childViews) {
+    for (SectionView view in sections.childViews) {
       if (view.section == section) {
         // Have the conveyor show it.
         sections.selectView(view);
         break;
       }
     }
   }
 
   /**
    * Create SectionViews for each Section in the app and add them to the
@@ skipping 554 matching lines @@
           if(dataView != null) {
             dataView.itemsView.showView(selArticle);
           }
         }
       }
     }
   }
 
   String getDataUriForImage(final img) {
     // TODO(hiltonc,jimhug) eval perf of this vs. reusing one canvas element
-    final canvas = new Element.html(
-        '<canvas width="${img.width}" height="${img.height}"></canvas>');
+    final CanvasElement canvas = new CanvasElement(
+      height: img.height, width: img.width);
 
-    final ctx = canvas.getContext("2d");
+    final CanvasRenderingContext2D ctx = canvas.getContext("2d");
     ctx.drawImage(img, 0, 0, img.width, img.height);
 
     return canvas.toDataURL("image/png");
   }
 
   /**
    * Update this view's selected appearance based on the currently selected
    * Article.
    */
   void _refreshSelected(curItem) {
@@ skipping 28 matching lines @@
         '<div class="story-content">${item.htmlBody}</div>');
     for (Element element in storyContent.queryAll(
         "iframe, script, style, object, embed, frameset, frame")) {
       element.remove();
     }
     _pagedStory = new PagedContentView(new View.fromNode(storyContent));
 
     // Modify all links to open in new windows....
     // TODO(jacobr): would it be better to add an event listener on click that
     // intercepts these instead?
-    for (final anchor in storyContent.queryAll('a')) {
+    for (AnchorElement anchor in storyContent.queryAll('a')) {
       anchor.target = '_blank';
     }
 
     final date = DateUtils.toRecentTimeString(item.date);
     final container = new Element.html('''
       <div class="story-view">
         <div class="story-text-view">
           <div class="story-header">
             <a class="story-title" href="${item.srcUrl}" target="_blank">
               ${item.title}</a>
@@ skipping 90 matching lines @@
    * [Feed].
    */
   DataSourceView findView(Feed dataSource) {
     return dataSourceView.getSubview(dataSourceView.findIndex(dataSource));
   }
 
   bool inCurrentView(Article article) {
     return dataSourceView.findIndex(article.dataSource) != null;
   }
 }