Reland of DevTools: properly restore selected DOMNode in Elements panel.

third_party/WebKit/Source/devtools/front_end/elements/ElementsTreeOutline.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 397 matching lines @@
         }
 
         this._selectedDOMNode = node;
         this._revealAndSelectNode(node, !focus);
 
         // The _revealAndSelectNode() method might find a different element if there is inlined text,
         // and the select() call would change the selectedDOMNode and reenter this setter. So to
         // avoid calling _selectedNodeChanged() twice, first check if _selectedDOMNode is the same
         // node as the one passed in.
         if (this._selectedDOMNode === node)
-            this._selectedNodeChanged();
+            this._selectedNodeChanged(!!focus);
     },
 
     /**
      * @return {boolean}
      */
     editing: function()
     {
         var node = this.selectedDOMNode();
         if (!node)
             return false;
@@ skipping 19 matching lines @@
             for (var child of children) {
                 var treeElement = this._createElementTreeElement(child);
                 this.appendChild(treeElement);
             }
         }
 
         if (selectedNode)
             this._revealAndSelectNode(selectedNode, true);
     },
 
-    _selectedNodeChanged: function()
+    /**
+     * @param {boolean} focus
+     */
+    _selectedNodeChanged: function(focus)
     {
-        this.dispatchEventToListeners(WebInspector.ElementsTreeOutline.Events.SelectedNodeChanged, this._selectedDOMNode);
+        this.dispatchEventToListeners(WebInspector.ElementsTreeOutline.Events.SelectedNodeChanged, {node: this._selectedDOMNode, focus: focus});
     },
 
     /**
      * @param {!Array.<!WebInspector.DOMNode>} nodes
      */
     _fireElementsTreeUpdated: function(nodes)
     {
         this.dispatchEventToListeners(WebInspector.ElementsTreeOutline.Events.ElementsTreeUpdated, nodes);
     },
 
@@ skipping 1318 matching lines @@
             if (node) {
                 this.treeOutline._selectedDOMNode = node;
                 this.treeOutline._selectedNodeChanged();
             }
         }
         return true;
     },
 
     __proto__: TreeElement.prototype
 };