1 files changed, 20 insertions, 9 deletions
diff --git a/Source/WebCore/rendering/OrderIterator.h b/Source/WebCore/rendering/OrderIterator.h
index e47c850ca..47cd27ad2 100644
--- a/Source/WebCore/rendering/OrderIterator.h
+++ b/Source/WebCore/rendering/OrderIterator.h
@@ -29,10 +29,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef OrderIterator_h
-#define OrderIterator_h
+#pragma once
 
 #include <wtf/Noncopyable.h>
+#include <wtf/Optional.h>
 #include <wtf/Vector.h>
 
 namespace WebCore {
@@ -41,10 +41,9 @@ class RenderBox;
 
 class OrderIterator {
 public:
-    OrderIterator(RenderBox&);
+    friend class OrderIteratorPopulator;
 
-    typedef Vector<int, 1> OrderValues;
-    void setOrderValues(OrderValues&&);
+    explicit OrderIterator(RenderBox&);
 
     RenderBox* currentChild() const { return m_currentChild; }
     RenderBox* first();
@@ -55,10 +54,22 @@ private:
 
     RenderBox& m_containerBox;
     RenderBox* m_currentChild;
-    OrderValues m_orderValues;
-    int m_orderIndex;
+
+    Vector<int, 1> m_orderValues;
+    std::optional<size_t> m_orderIndex;
 };
 
-} // namespace WebCore
+class OrderIteratorPopulator {
+public:
+    OrderIteratorPopulator(OrderIterator&);
+    ~OrderIteratorPopulator();
 
-#endif //  OrderIterator_h
+    void collectChild(const RenderBox&);
+
+private:
+    void removeDuplicatedOrderValues();
+
+    OrderIterator& m_iterator;
+};
+
+} // namespace WebCore