DevTools: Fix a bug where user agent shadow dom elements were inspectable

third_party/WebKit/Source/devtools/front_end/elements/ElementsPanel.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * 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
@@ skipping 850 matching lines @@
         if (treeOutline)
             treeOutline.handlePasteKeyboardEvent(event);
     },
 
     /**
      * @param {!WebInspector.DOMNode} node
      * @return {!WebInspector.DOMNode}
      */
     _leaveUserAgentShadowDOM: function(node)
     {
-        var userAgentShadowRoot = node.ancestorUserAgentShadowRoot();
-        return userAgentShadowRoot ? /** @type {!WebInspector.DOMNode} */ (userAgentShadowRoot.parentNode) : node;
+        var userAgentShadowRoot;
+        while ((userAgentShadowRoot = node.ancestorUserAgentShadowRoot()) && userAgentShadowRoot.parentNode)
+            node = userAgentShadowRoot.parentNode;
+        return node;
     },
 
     /**
      * @param {!WebInspector.DOMNode} node
      */
     revealAndSelectNode: function(node)
     {
         if (WebInspector.inspectElementModeController && WebInspector.inspectElementModeController.isInInspectElementMode())
             WebInspector.inspectElementModeController.stopInspection();
 
@@ skipping 404 matching lines @@
      */
     wasShown: function()
     {
         this._toolbarItem.setToggled(true);
         this._nodeChanged();
         WebInspector.ThrottledWidget.prototype.wasShown.call(this);
     },
 
     __proto__: WebInspector.ThrottledWidget.prototype
 }