layout: Add incremental box tree construction for table cell (#37850)

This change extends incremental box tree updates to table cells. In
addition, for simplicity this refactors `BoxSlot::take_layout_box()`
into `BoxSlot::take_layout_box_if_undamaged()`.

Testing: This should not change observable behavior and is thus covered
by existing WPT tests.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

components/layout/dom.rs

@@ -181,7 +181,10 @@ impl BoxSlot<'_> {
         }
     }
 
-    pub(crate) fn take_layout_box(&self) -> Option<LayoutBox> {
+    pub(crate) fn take_layout_box_if_undamaged(&self, damage: LayoutDamage) -> Option<LayoutBox> {
+        if damage.has_box_damage() {
+            return None;
+        }
         self.slot.as_ref().and_then(|slot| slot.borrow_mut().take())
     }
 }