Do not export natives to runtime via js builtins object.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 0241507220ef9ea9e51038bc88ba25b0aa4ca24a..a492547367a6b84b64549d2b4ab890561547803a 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -3,10 +3,8 @@
 // found in the LICENSE file.
 
 var $functionSourceString;
-var $globalEval;
 var $objectDefineOwnProperty;
 var $objectGetOwnPropertyDescriptor;
-var $toCompletePropertyDescriptor;
 
 (function(global, utils) {
 
@@ -1787,10 +1785,8 @@ function GetIterator(obj, method) {
 // Exports
 
 $functionSourceString = FunctionSourceString;
-$globalEval = GlobalEval;
 $objectDefineOwnProperty = DefineOwnPropertyFromAPI;
 $objectGetOwnPropertyDescriptor = ObjectGetOwnPropertyDescriptor;
-$toCompletePropertyDescriptor = ToCompletePropertyDescriptor;
 
 utils.ObjectDefineProperties = ObjectDefineProperties;
 utils.ObjectDefineProperty = ObjectDefineProperty;
@@ -1814,4 +1810,9 @@ utils.Export(function(to) {
   to.ToNameArray = ToNameArray;
 });
 
+utils.ExportToRuntime(function(to) {
+  to.GlobalEval = GlobalEval;
+  to.ToCompletePropertyDescriptor = ToCompletePropertyDescriptor;
+});
+
 })