Copy dictionary keys and values in enumeration in TransferNamedProperties

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index f291d692cfdffb7043c882e5dd7c01588217e643..7d01c91ce3becb9b1b11406d796a703606cd63f0 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3788,6 +3788,10 @@ class Dictionary: public HashTable<Derived, Shape, Key> {
 
   enum SortMode { UNSORTED, SORTED };
 
+  // Return the key indices sorted by its enumeration index.
+  static Handle<FixedArray> GetOrderedKeyIndices(
+      Handle<Dictionary<Derived, Shape, Key>> dictionary);
+
   // Collect the keys into the given KeyAccumulator, in ascending chronological
   // order of property creation.
   static void CollectKeysTo(Handle<Dictionary<Derived, Shape, Key>> dictionary,