anchor.diff:      // About to share.
       _cancelButton = new DButton.button(text: 'Cancel');
       _cancelButton.onClick.listen((_) => hide());
  +    _closeButton = new DButton.button(text: 'Close');
  +    _closeButton.onClick.listen((_) => hide());
       _shareButton = new DButton.button(text: 'Share it!', classes: 'default');
       _shareButton.onClick.listen((_) => _performShare());
   
  
positive.code:   ParagraphElement _text;
    TextAreaElement _textArea;
    DButton _cancelButton;
    DButton _shareButton;
    DElement _div;
    DElement _embedArea;
  
negative.code:       _embedHtmlRadio.checked = false;
        _embedDartRadio.checked = true;
        _embedToDart();
        buttonArea.add(_closeButton);
        buttonArea.add(new SpanElement()..attributes['flex'] = '');
      }
    }
  