Merge 117582 - Web Inspector: exception in console when pressing % button in CPU profile view

Source/WebCore/inspector/front-end/ProfileView.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 158 matching lines @@
 
         for (var index = 0; index < count; ++index)
             this.dataGrid.rootNode().appendChild(children[index]);
 
         if (selectedProfileNode)
             selectedProfileNode.selected = true;
     },
 
     refreshVisibleData: function()
     {
-        var child = this.dataGrid.children[0];
+        var child = this.dataGrid.rootNode().children[0];
         while (child) {
             child.refresh();
             child = child.traverseNextNode(false, null, true);
         }
     },
 
     refreshShowAsPercents: function()
     {
         this._updatePercentButton();
         this.refreshVisibleData();
@@ skipping 433 matching lines @@
         return new WebInspector.ProfileHeader(WebInspector.CPUProfileType.TypeId, WebInspector.UIString("Recording\u2026"));
     },
 
     createProfile: function(profile)
     {
         return new WebInspector.ProfileHeader(profile.typeId, profile.title, profile.uid);
     }
 }
 
 WebInspector.CPUProfileType.prototype.__proto__ = WebInspector.ProfileType.prototype;