anchor.diff:    Gist backupGist;
     Router _router;
   
  +  Document _dartDoc;
  +  Document _htmlDoc;
  +  Document _cssDoc;
  +  
     Editor editor;
     PlaygroundContext _context;
     Future _analysisRequest;
  
positive.code: 
      _context.onDartReconcile.listen((_) => _performAnalysis());
  
      docHandler = new DocHandler(editor, _context);
  
      _finishedInit();
  
negative.code:   PlaygroundMobile() {
      _createUi();
      _initModules().then((_) => _initPlayground());
      _dartDoc = editor.document;
      _htmlDoc = editor.createDocument(content: '', mode: 'html');
      _cssDoc = editor.createDocument(content: '', mode: 'css');
    }
  
    void showHome(RouteEnterEvent event) {
  