DevTools: migrate treeoutline from hasChildren to is/setExpandable().

Source/devtools/front_end/profiler/ProfilesPanel.js

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 902 matching lines @@
 
 
 /**
  * @constructor
  * @extends {WebInspector.SidebarSectionTreeElement}
  * @param {!WebInspector.ProfileType.DataDisplayDelegate} dataDisplayDelegate
  * @param {!WebInspector.ProfileType} profileType
  */
 WebInspector.ProfileTypeSidebarSection = function(dataDisplayDelegate, profileType)
 {
-    WebInspector.SidebarSectionTreeElement.call(this, profileType.treeItemTitle, true);
+    WebInspector.SidebarSectionTreeElement.call(this, profileType.treeItemTitle);
     this._dataDisplayDelegate = dataDisplayDelegate;
     this._profileTreeElements = [];
     this._profileGroups = {};
     this.hidden = true;
 }
 
 /**
  * @constructor
  */
 WebInspector.ProfileTypeSidebarSection.ProfileGroup = function()
@@ skipping 326 matching lines @@
 WebInspector.ProfilesPanelFactory.prototype = {
     /**
      * @override
      * @return {!WebInspector.Panel}
      */
     createPanel: function()
     {
         return WebInspector.ProfilesPanel._instance();
     }
 }