DevTools: Get rid of Element.prototype.enableStyleClass

Source/devtools/front_end/CanvasProfileView.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 256 matching lines @@
             lastNode = lastChild;
         }
         lastNode.revealAndSelect();
     },
 
     /**
      * @param {boolean} enable
      */
     _enableWaitIcon: function(enable)
     {
-        this._spinnerIcon.enableStyleClass("hidden", !enable);
-        this._debugInfoElement.enableStyleClass("hidden", enable);
+        this._spinnerIcon.classList.toggle("hidden", !enable);
+        this._debugInfoElement.classList.toggle("hidden", enable);
     },
 
     _replayTraceLog: function()
     {
         if (this._pendingReplayTraceLogEvent)
             return;
         var index = this._selectedCallIndex();
         if (index === -1 || index === this._lastReplayCallIndex)
             return;
         this._lastReplayCallIndex = index;
@@ skipping 612 matching lines @@
      * @return {string|undefined}
      */
     _selectedFrameId: function()
     {
         var option = this._frameSelector.selectedOption();
         return option ? option.value : undefined;
     },
 
     _dispatchViewUpdatedEvent: function()
     {
-        this._frameSelector.element.enableStyleClass("hidden", this._frameSelector.size() <= 1);
+        this._frameSelector.element.classList.toggle("hidden", this._frameSelector.size() <= 1);
         this.dispatchEventToListeners(WebInspector.ProfileType.Events.ViewUpdated);
     },
 
     /**
      * @override
      * @return {boolean}
      */
     isInstantProfile: function()
     {
         return this._isSingleFrameMode();
@@ skipping 326 matching lines @@
     },
 
     clearResourceStates: function()
     {
         this._currentResourceStates = {};
         this.dispatchEventToListeners(WebInspector.CanvasTraceLogPlayerProxy.Events.CanvasReplayStateChanged);
     },
 
     __proto__: WebInspector.Object.prototype
 }