DevTools: Get rid of Element.prototype.enableStyleClass

Source/devtools/front_end/ConsoleView.js

 /*
  * Copyright (C) 2007, 2008 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 124 matching lines @@
      * @return {!Element}
      */
     defaultFocusedElement: function()
     {
         return this.promptElement
     },
 
     _onFiltersToggled: function(event)
     {
         var toggled = /** @type {boolean} */ (event.data);
-        this._filtersContainer.enableStyleClass("hidden", !toggled);
+        this._filtersContainer.classList.toggle("hidden", !toggled);
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _frameAdded: function(event)
     {
         var contextList = /** @type {!WebInspector.FrameExecutionContextList} */ (event.data);
         this._addFrame(contextList);
     },
@@ skipping 986 matching lines @@
                 node.group.wasShown();
             node = node.nextSibling;
         }
     }
 }
 
 /**
  * @type {!WebInspector.ConsoleView}
  */
 WebInspector.consoleView;