Bug 1603649 - Add NS_IMPL_FROMNODE_HELPER for XULFrameElement (idea by :bz). r=farre

Differential Revision: https://phabricator.services.mozilla.com/D57883

--HG--
extra : moz-landing-system : lando

dom/xul/XULFrameElement.h

@@ -63,6 +63,11 @@ class XULFrameElement final : public nsXULElement, public nsFrameLoaderOwner {
                                 nsIPrincipal* aSubjectPrincipal,
                                 bool aNotify) override;
 
+  NS_IMPL_FROMNODE_HELPER(XULFrameElement,
+                          IsAnyOfXULElements(nsGkAtoms::iframe,
+                                             nsGkAtoms::browser,
+                                             nsGkAtoms::editor))
+
  protected:
   virtual ~XULFrameElement() {}