style: Implement ElementWrapper::pseudo_element_originating_element in terms of its TElement implementation.

This matches right now, but it may not in the future.

components/style/invalidation/element/element_wrapper.rs

@@ -348,7 +348,7 @@ impl<'a, E> Element for ElementWrapper<'a, E>
     }
 
     fn pseudo_element_originating_element(&self) -> Option<Self> {
-        self.element.closest_non_native_anonymous_ancestor()
+        self.element.pseudo_element_originating_element()
             .map(|e| ElementWrapper::new(e, self.snapshot_map))
     }
 }