Remove property loads from js builtins objects from runtime.

src/v8natives.js

 // 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.
 
 var $functionSourceString;
-var $objectDefineOwnProperty;
-var $objectGetOwnPropertyDescriptor;
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 // ----------------------------------------------------------------------------
 // Imports
 
 var GlobalArray = global.Array;
 var GlobalBoolean = global.Boolean;
@@ skipping 1760 matching lines @@
   if (!IS_SPEC_OBJECT(iterator)) {
     throw MakeTypeError(kNotAnIterator, iterator);
   }
   return iterator;
 }
 
 // ----------------------------------------------------------------------------
 // Exports
 
 $functionSourceString = FunctionSourceString;
-$objectDefineOwnProperty = DefineOwnPropertyFromAPI;
-$objectGetOwnPropertyDescriptor = ObjectGetOwnPropertyDescriptor;
 
 utils.ObjectDefineProperties = ObjectDefineProperties;
 utils.ObjectDefineProperty = ObjectDefineProperty;
 
 utils.Export(function(to) {
   to.Delete = Delete;
   to.GetIterator = GetIterator;
   to.GetMethod = GetMethod;
   to.IsFinite = GlobalIsFinite;
   to.IsNaN = GlobalIsNaN;
   to.NewFunctionString = NewFunctionString;
   to.NumberIsNaN = NumberIsNaN;
   to.ObjectDefineProperty = ObjectDefineProperty;
   to.ObjectFreeze = ObjectFreezeJS;
   to.ObjectGetOwnPropertyKeys = ObjectGetOwnPropertyKeys;
   to.ObjectHasOwnProperty = ObjectHasOwnProperty;
   to.ObjectIsFrozen = ObjectIsFrozen;
   to.ObjectIsSealed = ObjectIsSealed;
   to.ObjectToString = ObjectToString;
   to.OwnPropertyKeys = OwnPropertyKeys;
   to.ToNameArray = ToNameArray;
 });
 
 utils.ExportToRuntime(function(to) {
   to.GlobalEval = GlobalEval;
+  to.ObjectDefineOwnProperty = DefineOwnPropertyFromAPI;
+  to.ObjectGetOwnPropertyDescriptor = ObjectGetOwnPropertyDescriptor;
   to.ToCompletePropertyDescriptor = ToCompletePropertyDescriptor;
 });
 
 })