Bug 346669 - disallow dropping items into a live-bookmark container. r=sspitzer.

browser/components/places/content/tree.xml

@@ -822,10 +822,10 @@
             var droppingOnSelf = 
                 this._getSourceView() == this._self &&
                 this._self.view.selection.isSelected(index);
-            if (droppingOnSelf || node.containerReadOnly)
+            if (droppingOnSelf || PlacesUtils.nodeIsReadOnly(node))
               return false;
           } 
-          else if (node.parent && node.parent.containerReadOnly)
+          else if (node.parent && PlacesUtils.nodeIsReadOnly(node.parent))
             return false;
           
           return PlacesControllerDragHelper.canDrop(this._self, orientation);