Make order of addition the primary order of descriptor arrays.

src/handles.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 683 matching lines @@
   Isolate* isolate = object->GetIsolate();
   isolate->counters()->for_in()->Increment();
   Handle<FixedArray> elements =
       GetKeysInFixedArrayFor(object, INCLUDE_PROTOS, threw);
   return isolate->factory()->NewJSArrayWithElements(elements);
 }
 
 
 Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
                                        bool cache_result) {
-  int index = 0;
   Isolate* isolate = object->GetIsolate();
   if (object->HasFastProperties()) {
     if (object->map()->instance_descriptors()->HasEnumCache()) {
       isolate->counters()->enum_cache_hits()->Increment();
       DescriptorArray* desc = object->map()->instance_descriptors();
       return Handle<FixedArray>(FixedArray::cast(desc->GetEnumCache()),
                                 isolate);
     }
     isolate->counters()->enum_cache_misses()->Increment();
     Handle<Map> map(object->map());
     int num_enum = object->NumberOfLocalProperties(DONT_ENUM);
 
     Handle<FixedArray> storage = isolate->factory()->NewFixedArray(num_enum);
-    Handle<FixedArray> sort_array = isolate->factory()->NewFixedArray(num_enum);
-
     Handle<FixedArray> indices;
-    Handle<FixedArray> sort_array2;
 
     if (cache_result) {
       indices = isolate->factory()->NewFixedArray(num_enum);
-      sort_array2 = isolate->factory()->NewFixedArray(num_enum);
     }
 
     Handle<DescriptorArray> descs =
         Handle<DescriptorArray>(object->map()->instance_descriptors(), isolate);
 
+    int index = 0;
     for (int i = 0; i < descs->number_of_descriptors(); i++) {
       if (!descs->GetDetails(i).IsDontEnum()) {
         storage->set(index, descs->GetKey(i));
         PropertyDetails details = descs->GetDetails(i);
-        sort_array->set(index, Smi::FromInt(details.index()));
         if (!indices.is_null()) {
           if (details.type() != FIELD) {
             indices = Handle<FixedArray>();
-            sort_array2 = Handle<FixedArray>();
           } else {
             int field_index = Descriptor::IndexFromValue(descs->GetValue(i));
             if (field_index >= map->inobject_properties()) {
               field_index = -(field_index - map->inobject_properties() + 1);
             }
             indices->set(index, Smi::FromInt(field_index));
-            sort_array2->set(index, Smi::FromInt(details.index()));
           }
         }
         index++;
       }
     }
-    storage->SortPairs(*sort_array, sort_array->length());
-    if (!indices.is_null()) {
-      indices->SortPairs(*sort_array2, sort_array2->length());
-    }
     if (cache_result) {
       Handle<FixedArray> bridge_storage =
           isolate->factory()->NewFixedArray(
               DescriptorArray::kEnumCacheBridgeLength);
       DescriptorArray* desc = object->map()->instance_descriptors();
       desc->SetEnumCache(*bridge_storage,
                          *storage,
                          indices.is_null() ? Object::cast(Smi::FromInt(0))
                                            : Object::cast(*indices));
     }
@@ skipping 229 matching lines @@
   data->next = prev_next_;
   data->limit = prev_limit_;
 #ifdef DEBUG
   handles_detached_ = true;
 #endif
   return deferred;
 }
 
 
 } }  // namespace v8::internal