This change removes the %AddProperty native JavaScript function from V8....

src/apinatives.js

 // 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 49 matching lines @@
 
 function InstantiateFunction(data, name) {
   var serialNumber = %GetTemplateField(data, kApiSerialNumberOffset);
   if (!(serialNumber in kApiFunctionCache)) {
     kApiFunctionCache[serialNumber] = null;
     var fun = %CreateApiFunction(data);
     if (name) %FunctionSetName(fun, name);
     kApiFunctionCache[serialNumber] = fun;
     var prototype = %GetTemplateField(data, kApiPrototypeTemplateOffset);
     fun.prototype = prototype ? Instantiate(prototype) : {};
-    %AddProperty(fun.prototype, "constructor", fun, DONT_ENUM);
+    %SetProperty(fun.prototype, "constructor", fun, DONT_ENUM);
     var parent = %GetTemplateField(data, kApiParentTemplateOffset);
     if (parent) {
       var parent_fun = Instantiate(parent);
       fun.prototype.__proto__ = parent_fun.prototype;
     }
     ConfigureTemplateInstance(fun, data);
   }
   return kApiFunctionCache[serialNumber];
 }
 
 
 function ConfigureTemplateInstance(obj, data) {
   var properties = %GetTemplateField(data, kApiPropertyListOffset);
   if (properties) {
     for (var i = 0; i < properties[0]; i += 3) {
       var name = properties[i + 1];
       var prop_data = properties[i + 2];
       var attributes = properties[i + 3];
       var value = Instantiate(prop_data, name);
       %SetProperty(obj, name, value, attributes);
     }
   }
 }