Devtools: make DOM traversal utilities climb shadow tree.

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 33 matching lines @@
     this._splitView.addEventListener(WebInspector.SplitView.Events.SidebarSizeChanged, this._updateTreeOutlineVisibleWidth.bind(this));
     this._splitView.show(this.element);
 
     this._searchableView = new WebInspector.SearchableView(this);
     this._searchableView.setMinimumSize(25, 19);
     this._searchableView.show(this._splitView.mainElement());
     var stackElement = this._searchableView.element;
 
     this.contentElement = stackElement.createChild("div");
     this.contentElement.id = "elements-content";
-    this.contentElement.classList.add("outline-disclosure");
-    this.contentElement.classList.add("source-code");
+    this.contentElement.classList.add("outline-disclosure", "source-code");
     if (!WebInspector.settings.domWordWrap.get())
         this.contentElement.classList.add("nowrap");
     WebInspector.settings.domWordWrap.addChangeListener(this._domWordWrapSettingChanged.bind(this));
 
     this._splitView.sidebarElement().addEventListener("contextmenu", this._sidebarContextMenuEventFired.bind(this), false);
 
     var crumbsContainer = stackElement.createChild("div");
     crumbsContainer.id = "elements-crumbs";
     this.crumbsElement = crumbsContainer.createChild("div", "crumbs");
     this.crumbsElement.addEventListener("mousemove", this._mouseMovedInCrumbs.bind(this), false);
@@ skipping 629 matching lines @@
 
     _metricsPaneEdited: function()
     {
         // Once metrics are edited, the Styles pane should be updated.
         this.sidebarPanes.styles.needsUpdate = true;
         this.updateStyles(true);
     },
 
     _mouseMovedInCrumbs: function(event)
     {
-        var nodeUnderMouse = document.elementFromPoint(event.pageX, event.pageY);
+        var nodeUnderMouse = event.elementFromPoint();
         var crumbElement = nodeUnderMouse.enclosingNodeOrSelfWithClass("crumb");
         var node = /** @type {?WebInspector.DOMNode} */ (crumbElement ? crumbElement.representedObject : null);
         if (node)
             node.highlight();
     },
 
     _mouseMovedOutOfCrumbs: function(event)
     {
-        var nodeUnderMouse = document.elementFromPoint(event.pageX, event.pageY);
+        var nodeUnderMouse = event.elementFromPoint();
         if (nodeUnderMouse && nodeUnderMouse.isDescendant(this.crumbsElement))
             return;
 
         for (var i = 0; i < this._treeOutlines.length; ++i)
             this._treeOutlines[i].domModel().hideDOMNodeHighlight();
     },
 
     /**
      * @param {boolean=} forceUpdate
      */
@@ skipping 878 matching lines @@
         /**
          * @suppressReceiverCheck
          * @this {Element}
          */
         function parentElement()
         {
             return this.parentElement;
         }
     }
 }