1 files changed, 11 insertions, 1 deletions
diff --git a/dom/base/ElementInlines.h b/dom/base/ElementInlines.h
index 540512d89..16e8c2fc6 100644
--- a/dom/base/ElementInlines.h
+++ b/dom/base/ElementInlines.h
@@ -1,5 +1,4 @@
 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@@ -26,6 +25,17 @@ Element::UnregisterActivityObserver()
   OwnerDoc()->UnregisterActivityObserver(this);
 }
 
+inline Element*
+Element::GetFlattenedTreeParentElementForStyle() const
+{
+  nsINode* parentNode = GetFlattenedTreeParentNodeForStyle();
+  if MOZ_LIKELY(parentNode && parentNode->IsElement()) {
+    return parentNode->AsElement();
+  }
+
+  return nullptr;
+}
+
 } // namespace dom
 } // namespace mozilla