DevTools: reuse computedstylesmodel in the elements sidebar base class.

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

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * 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
@@ skipping 742 matching lines @@
         for (var i = 0; i < this._treeOutlines.length; ++i) {
             if (this._treeOutlines[i].selectedDOMNode() === this._lastValidSelectedNode)
                 treeOutline = this._treeOutlines[i];
         }
         if (!treeOutline)
             return;
 
         if (!treeOutline.editing()) {
             handleUndoRedo.call(null, treeOutline);
             if (event.handled) {
-                this.sidebarPanes.styles.onUndoOrRedoHappened();
+                this.sidebarPanes.styles.forceUpdate();
                 return;
             }
         }
 
         treeOutline.handleShortcut(event);
         if (event.handled)
             return;
 
         WebInspector.Panel.prototype.handleShortcut.call(this, event);
     },
@@ skipping 406 matching lines @@
     /**
      * @override
      * @param {!WebInspector.DOMNode} node
      * @return {?{title: string, color: string}}
      */
     decorate: function(node)
     {
         return { color: "orange", title: WebInspector.UIString("Element state: %s", ":" + WebInspector.CSSModel.fromNode(node).pseudoState(node).join(", :")) };
     }
 }