Use simple CSS selectors to identify elements in Layer's panel tree view

Source/devtools/front_end/Layers3DView.js

 /*
  * Copyright (C) 2014 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 362 matching lines @@
         element = element.enclosingNodeOrSelfWithClass("layer-container");
         return element && element.__layerDetails && element.__layerDetails.layer;
     },
 
     /**
      * @param {?Event} event
      */
     _onContextMenu: function(event)
     {
         var layer = this._layerFromEventPoint(event);
-        var nodeId = layer && layer.nodeId();
+        var nodeId = layer && layer.nodeIdForSelfOrAncestor();
         if (!nodeId)
             return;
         var domNode = WebInspector.domAgent.nodeForId(nodeId);
         if (!domNode)
             return;
          var contextMenu = new WebInspector.ContextMenu(event);
         contextMenu.appendApplicableItems(domNode);
         contextMenu.show();
     },
 
@@ skipping 34 matching lines @@
  * @param {!WebInspector.Layer} layer
  * @param {!Element} paintRectElement
  */
 WebInspector.LayerDetails = function(layer, paintRectElement)
 {
     this.layer = layer;
     this.depth = 0;
     this.paintRectElement = paintRectElement;
     this.paintCount = 0;
 }