Copy dictionary keys and values in enumeration in TransferNamedProperties

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 3770 matching lines @@
   // with the specified attributes.
   int NumberOfElementsFilterAttributes(PropertyFilter filter);
 
   // Returns the number of enumerable elements in the dictionary.
   int NumberOfEnumElements() {
     return NumberOfElementsFilterAttributes(ENUMERABLE_STRINGS);
   }
 
   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,
                             KeyAccumulator* keys);
 
   // Copies enumerable keys to preallocated fixed array.
   static void CopyEnumKeysTo(Handle<Dictionary<Derived, Shape, Key>> dictionary,
                              Handle<FixedArray> storage, KeyCollectionMode mode,
                              KeyAccumulator* accumulator);
 
@@ skipping 8106 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_