Devtools: Fix auto-expanding of arrays and function scopes in watches

third_party/WebKit/Source/devtools/front_end/components/ObjectPropertiesSection.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1264 matching lines @@
             if (property.startsWith(id + ":"))
                 this._expandedProperties.delete(property);
         }
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _elementAttached: function(event)
     {
-        var element = /** @type {!WebInspector.ObjectPropertyTreeElement|!WebInspector.ObjectPropertiesSection.RootElement} */ (event.data);
+        var element = /** @type {!TreeElement} */ (event.data);
         if (element.isExpandable() && this._expandedProperties.has(this._propertyPath(element)))
             element.expand();
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _elementExpanded: function(event)
     {
-        var element = /** @type {!WebInspector.ObjectPropertyTreeElement|!WebInspector.ObjectPropertiesSection.RootElement} */ (event.data);
+        var element = /** @type {!TreeElement} */ (event.data);
         this._expandedProperties.add(this._propertyPath(element));
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _elementCollapsed: function(event)
     {
-        var element = /** @type {!WebInspector.ObjectPropertyTreeElement|!WebInspector.ObjectPropertiesSection.RootElement} */ (event.data);
+        var element = /** @type {!TreeElement} */ (event.data);
         this._expandedProperties.delete(this._propertyPath(element));
     },
 
     /**
-     * @param {!WebInspector.ObjectPropertyTreeElement|!WebInspector.ObjectPropertiesSection.RootElement} treeElement
+     * @param {!TreeElement} treeElement
      * @return {string}
      */
     _propertyPath: function(treeElement)
     {
         var cachedPropertyPath = treeElement[WebInspector.ObjectPropertiesSectionExpandController._cachedPathSymbol];
         if (cachedPropertyPath)
             return cachedPropertyPath;
 
         var current = treeElement;
         var rootElement = treeElement.treeOutline.objectTreeElement();
 
         var result;
 
         while (current !== rootElement) {
-            result = current.property.name + (result ? "." + result : "");
+            var currentName = "";
+            if (current.property)
+                currentName = current.property.name;
+            else
+                currentName = typeof current.title === "string" ? current.title : current.title.textContent;
+
+            result = currentName + (result ? "." + result : "");
             current = current.parent;
         }
         var treeOutlineId = treeElement.treeOutline[WebInspector.ObjectPropertiesSectionExpandController._treeOutlineId];
         result = treeOutlineId + (result ? ":" + result : "");
         treeElement[WebInspector.ObjectPropertiesSectionExpandController._cachedPathSymbol] = result;
         return result;
     }
 }