Devtools: make DOM traversal utilities climb shadow tree.

Source/devtools/front_end/timeline/PaintProfilerView.js

 /*
  * Copyright (C) 2013 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 288 matching lines @@
     _reset: function()
     {
         this._log = [];
     },
 
     /**
      * @param {?Event} event
      */
     _onMouseMove: function(event)
     {
-        var node = this.sidebarTree.treeElementFromPoint(event.pageX, event.pageY);
+        var node = this.sidebarTree.treeElementFromEvent(event);
         if (node === this._lastHoveredNode || !(node instanceof WebInspector.LogTreeElement))
             return;
         if (this._lastHoveredNode)
             this._lastHoveredNode.setHovered(false);
         this._lastHoveredNode = node;
         if (this._lastHoveredNode)
             this._lastHoveredNode.setHovered(true);
     },
 
     /**
-     * @param {?Event} event
+     * @param {!Event} event
      */
     _onContextMenu: function(event)
     {
         if (!this._target)
             return;
-        var node = this.sidebarTree.treeElementFromPoint(event.pageX, event.pageY);
+        var node = this.sidebarTree.treeElementFromEvent(event);
         if (!node || !node.representedObject || !(node instanceof WebInspector.LogTreeElement))
             return;
         var logItem = /** @type {!WebInspector.PaintProfilerLogItem} */ (node.representedObject);
         if (!logItem.nodeId())
             return;
         var contextMenu = new WebInspector.ContextMenu(event);
         var domNode = new WebInspector.DeferredDOMNode(this._target, logItem.nodeId());
         contextMenu.appendApplicableItems(domNode);
         contextMenu.show();
     },
@@ skipping 244 matching lines @@
     var method = logItem.method.toTitleCase();
 
     var logItemCategories = WebInspector.PaintProfilerView._initLogItemCategories();
     var result = logItemCategories[method];
     if (!result) {
         result = WebInspector.PaintProfilerView.categories()["misc"];
         logItemCategories[method] = result;
     }
     return result;
 }