Treat the builtins object like other global objects (with...

src/factory.h

 // Copyright 2006-2008 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 165 matching lines @@
   // structures in the heap.
   static Handle<JSObject> NewNeanderObject();
 
   static Handle<JSObject> NewArgumentsObject(Handle<Object> callee, int length);
 
   // JS objects are pretenured when allocated by the bootstrapper and
   // runtime.
   static Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
                                       PretenureFlag pretenure = NOT_TENURED);
 
-  // JS global objects are pretenured.
-  static Handle<JSGlobalObject> NewJSGlobalObject(
-      Handle<JSFunction> constructor);
+  // Global objects are pretenured.
+  static Handle<GlobalObject> NewGlobalObject(Handle<JSFunction> constructor);
 
   // JS objects are pretenured when allocated by the bootstrapper and
   // runtime.
   static Handle<JSObject> NewJSObjectFromMap(Handle<Map> map);
 
   // JS arrays are pretenured when allocated by the parser.
   static Handle<JSArray> NewJSArray(int init_length,
                                     PretenureFlag pretenure = NOT_TENURED);
 
   static Handle<JSArray> NewJSArrayWithElements(
@@ skipping 162 matching lines @@
   // Update the map cache in the global context with (keys, map)
   static Handle<MapCache> AddToMapCache(Handle<Context> context,
                                         Handle<FixedArray> keys,
                                         Handle<Map> map);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_