Preserve order of fields when doing slow-to-fast object migration.

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 6884 matching lines @@
 }
 
 
 Handle<Object> NameDictionaryShape::AsHandle(Isolate* isolate,
                                              Handle<Name> key) {
   DCHECK(key->IsUniqueName());
   return key;
 }
 
 
-void NameDictionary::DoGenerateNewEnumerationIndices(
+Handle<FixedArray> NameDictionary::DoGenerateNewEnumerationIndices(
     Handle<NameDictionary> dictionary) {
-  DerivedDictionary::GenerateNewEnumerationIndices(dictionary);
+  return DerivedDictionary::GenerateNewEnumerationIndices(dictionary);
 }
 
 
 bool ObjectHashTableShape::IsMatch(Handle<Object> key, Object* other) {
   return key->SameValue(other);
 }
 
 
 uint32_t ObjectHashTableShape::Hash(Handle<Object> key) {
   return Smi::cast(key->GetHash())->value();
@@ skipping 339 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_