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

src/property.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 242 matching lines @@
     return true;
   }
 
   Object* GetLazyValue() {
     switch (type()) {
       case FIELD:
         return holder()->FastPropertyAt(GetFieldIndex());
       case NORMAL: {
         Object* value;
         value = holder()->property_dictionary()->ValueAt(GetDictionaryEntry());
-        if (holder()->IsJSGlobalObject()) {
+        if (holder()->IsGlobalObject()) {
           value = JSGlobalPropertyCell::cast(value)->value();
         }
         return value;
       }
       case CONSTANT_FUNCTION:
         return GetConstantFunction();
       default:
         return Smi::FromInt(0);
     }
   }
@@ skipping 132 matching lines @@
 
   // Append a descriptor to this stream.
   void Write(Descriptor* desc);
   // Read a descriptor from the reader and append it to this stream.
   void WriteFrom(DescriptorReader* reader);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_