DevTools: simplify & fix property overload logic

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 1251 matching lines @@
     {
         if (this.styleRule.selectorText())
             this._selectorElement.textContent = this.styleRule.selectorText();
         this._markSelectorMatches();
         if (full) {
             this.propertiesTreeOutline.removeChildren();
             this.onpopulate();
         } else {
             var child = this.propertiesTreeOutline.firstChild();
             while (child) {
-                child.setOverloaded(this.styleRule.isPropertyOverloaded(child.name, child.isShorthand));
+                child.setOverloaded(this.styleRule.isPropertyOverloaded(child.name));
                 child = child.traverseNextTreeElement(false, null, true);
             }
         }
         this.afterUpdate();
     },
 
     afterUpdate: function()
     {
         if (this._afterUpdate) {
             this._afterUpdate(this);
             delete this._afterUpdate;
             this._afterUpdateFinishedForTest();
         }
     },
 
     _afterUpdateFinishedForTest: function()
     {
     },
 
     onpopulate: function()
     {
         var style = this.styleRule.style();
         for (var property of style.leadingProperties()) {
             var isShorthand = !!WebInspector.CSSMetadata.cssPropertiesMetainfo.longhands(property.name);
             var inherited = this.isPropertyInherited(property.name);
-            var overloaded = this.styleRule.isPropertyOverloaded(property.name, isShorthand);
+            var overloaded = this.styleRule.isPropertyOverloaded(property.name);
             var item = new WebInspector.StylePropertyTreeElement(this._parentPane, this.styleRule, property, isShorthand, inherited, overloaded);
             this.propertiesTreeOutline.appendChild(item);
         }
     },
 
     /**
      * @return {boolean}
      */
     _updateFilter: function()
     {
@@ skipping 1886 matching lines @@
 
     /**
      * @override
      * @return {?WebInspector.ToolbarItem}
      */
     item: function()
     {
         return this._button;
     }
 }