DevTools: Get rid of Element.prototype.enableStyleClass

Source/devtools/front_end/TimelineView.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 1014 matching lines @@
             paddingLeft += 12 / (Math.max(1, step++));
         this.element.style.paddingLeft = paddingLeft + "px";
         if (record.thread)
             this.element.classList.add("background");
 
         this._typeElement.textContent = record.title();
 
         if (this._dataElement.firstChild)
             this._dataElement.removeChildren();
 
-        this._warningElement.enableStyleClass("hidden", !presentationRecord.hasWarnings() && !presentationRecord.childHasWarnings());
-        this._warningElement.enableStyleClass("timeline-tree-item-child-warning", presentationRecord.childHasWarnings() && !presentationRecord.hasWarnings());
+        this._warningElement.classList.toggle("hidden", !presentationRecord.hasWarnings() && !presentationRecord.childHasWarnings());
+        this._warningElement.classList.toggle("timeline-tree-item-child-warning", presentationRecord.childHasWarnings() && !presentationRecord.hasWarnings());
 
         if (presentationRecord.coalesced()) {
             this._dataElement.createTextChild(WebInspector.UIString("× %d", presentationRecord.presentationChildren().length));
         } else {
             var detailsNode = WebInspector.TimelineUIUtils.buildDetailsNode(record, this._linkifier);
             if (detailsNode) {
                 this._dataElement.appendChild(document.createTextNode("("));
                 this._dataElement.appendChild(detailsNode);
                 this._dataElement.appendChild(document.createTextNode(")"));
             }
         }
 
-        this._expandArrowElement.enableStyleClass("parent", presentationRecord.hasPresentationChildren());
-        this._expandArrowElement.enableStyleClass("expanded", !!presentationRecord.visibleChildrenCount());
+        this._expandArrowElement.classList.toggle("parent", presentationRecord.hasPresentationChildren());
+        this._expandArrowElement.classList.toggle("expanded", !!presentationRecord.visibleChildrenCount());
         this._record.setListRow(this);
     },
 
     highlight: function(regExp, domChanges)
     {
         var matchInfo = this.element.textContent.match(regExp);
         if (matchInfo)
             WebInspector.highlightSearchResult(this.element, matchInfo.index, matchInfo[0].length, domChanges);
     },
 
@@ skipping 18 matching lines @@
     _onClick: function(event)
     {
         this._selectRecord(this._record);
     },
 
     /**
      * @param {boolean} selected
      */
     renderAsSelected: function(selected)
     {
-        this.element.enableStyleClass("selected", selected);
+        this.element.classList.toggle("selected", selected);
     },
 
     /**
      * @param {?Event} event
      */
     _onMouseOver: function(event)
     {
         this.element.classList.add("hovered");
         if (this._record.graphRow())
             this._record.graphRow().element.classList.add("hovered");
@@ skipping 83 matching lines @@
         if (this._expandElement._arrow.containsEventPoint(event))
             this._expand();
         this._selectRecord(this._record);
     },
 
     /**
      * @param {boolean} selected
      */
     renderAsSelected: function(selected)
     {
-        this.element.enableStyleClass("selected", selected);
+        this.element.classList.toggle("selected", selected);
     },
 
     _expand: function()
     {
         this._record.setCollapsed(!this._record.collapsed());
         this._scheduleRefresh();
     },
 
     /**
      * @param {?Event} event
@@ skipping 55 matching lines @@
             this._element.classList.remove("hidden");
         } else
             this._element.classList.add("hidden");
     },
 
     _dispose: function()
     {
         this._element.remove();
     }
 }