anchor.diff:    ParagraphElement _text;
     TextAreaElement _textArea;
     DButton _cancelButton;
  +  DButton _closeButton;
     DButton _shareButton;
     DElement _div;
     DElement _embedArea;
  
positive.code:       _embedHtmlRadio.checked = false;
        _embedDartRadio.checked = true;
        _embedToDart();
        buttonArea.add(_cancelButton);
        buttonArea.add(new SpanElement()..attributes['flex'] = '');
      }
    }
  
negative.code:     // 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());
  
  