Remove postorder traversal from layout 2020 during styling

1 files changed, 15 insertions, 12 deletions

diff --git a/components/layout_2020/traversal.rs b/components/layout_2020/traversal.rs
index 71f7a944247..1f73a7816f1 100644
--- a/components/layout_2020/traversal.rs
+++ b/components/layout_2020/traversal.rs
@@ -45,23 +45,26 @@ where
     ) where
         F: FnMut(E::ConcreteNode),
     {
-        unsafe { node.initialize_data() };
-
-        if !node.is_text_node() {
-            let el = node.as_element().unwrap();
-            let mut data = el.mutate_data().unwrap();
-            recalc_style_at(self, traversal_data, context, el, &mut data, note_child);
-        }
-    }
-
-    fn process_postorder(&self, _style_context: &mut StyleContext<E>, node: E::ConcreteNode) {
-        if let Some(el) = node.as_element() {
-            unsafe {
+        unsafe {
+            node.initialize_data();
+            if !node.is_text_node() {
+                let el = node.as_element().unwrap();
+                let mut data = el.mutate_data().unwrap();
+                recalc_style_at(self, traversal_data, context, el, &mut data, note_child);
                 el.unset_dirty_descendants();
             }
         }
     }
 
+    #[inline]
+    fn needs_postorder_traversal() -> bool {
+        false
+    }
+
+    fn process_postorder(&self, _style_context: &mut StyleContext<E>, _node: E::ConcreteNode) {
+        panic!("this should never be called")
+    }
+
     fn text_node_needs_traversal(node: E::ConcreteNode, parent_data: &ElementData) -> bool {
         node.get_style_and_layout_data().is_none() || !parent_data.damage.is_empty()
     }