DevTools: remove BaseToolbarPaneWidget.

third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 188 matching lines @@
         this._updateFilter();
     },
 
     /**
      * @override
      * @param {?WebInspector.DOMNode} node
      */
     setNode: function(node)
     {
         this._stylesPopoverHelper.hide();
-        node = WebInspector.SharedSidebarModel.elementNode(node);
+        node = node ? node.enclosingElementOrSelf() : null;
 
         this._resetCache();
         WebInspector.ElementsSidebarPane.prototype.setNode.call(this, node);
     },
 
     /**
      * @param {!WebInspector.StylePropertiesSection=} editedSection
      */
     _refreshUpdate: function(editedSection)
     {
@@ skipping 2917 matching lines @@
     WebInspector.context.addFlavorChangeListener(WebInspector.DOMNode, onNodeChanged);
     onNodeChanged();
     return button;
 
     function onNodeChanged()
     {
         var node = WebInspector.context.flavor(WebInspector.DOMNode);
         button.setEnabled(!!node);
     }
 }