DevTools: Get rid of Element.prototype.enableStyleClass

Source/devtools/front_end/FilterBar.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 473 matching lines @@
         this._update();
     },
 
     _update: function()
     {
         if ((Object.keys(this._allowedTypes).length === 0) || this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES]) {
             this._allowedTypes = {};
             this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES] = true;
         }
         for (var typeName in this._typeFilterElements)
-            this._typeFilterElements[typeName].enableStyleClass("selected", this._allowedTypes[typeName]);
+            this._typeFilterElements[typeName].classList.toggle("selected", this._allowedTypes[typeName]);
         this.dispatchEventToListeners(WebInspector.FilterUI.Events.FilterChanged, null);
     },
 
     /**
      * @param {string} name
      * @param {string} label
      */
     addBit: function(name, label)
     {
         var typeFilterElement = this._filtersElement.createChild("li", name);
@@ skipping 173 matching lines @@
      * @param {boolean} state
      */
     setState: function(state)
     {
         this._checked = state;
         this._update();
     },
 
     _update: function()
     {
-        this._checkElement.enableStyleClass("checkbox-filter-checkbox-checked", this._checked);
+        this._checkElement.classList.toggle("checkbox-filter-checkbox-checked", this._checked);
         this.dispatchEventToListeners(WebInspector.FilterUI.Events.FilterChanged, null);
     },
 
     _settingChanged: function()
     {
         this._checked = this._setting.get();
         this._update();
     },
 
     /**
@@ skipping 16 matching lines @@
         var label = this._filterElement.createChild("label");
         var checkBorder = label.createChild("div", "checkbox-filter-checkbox");
         this._checkElement = checkBorder.createChild("div", "checkbox-filter-checkbox-check");
         this._filterElement.addEventListener("click", this._onClick.bind(this), false);
         var typeElement = label.createChild("span", "type");
         typeElement.textContent = title;
     },
 
     __proto__: WebInspector.Object.prototype
 }