Native context: do not put public symbols and flags on the js builtins object.

src/i18n.js

Index: src/i18n.js
diff --git a/src/i18n.js b/src/i18n.js
index f0bcbc3c4f9959772c2dfd131804e4502ab503e5..c50f1f9e592364bc5dc91038c6239e725fcd78c6 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -28,6 +28,8 @@ var GlobalNumber = global.Number;
 var GlobalRegExp = global.RegExp;
 var GlobalString = global.String;
 var MathFloor;
+var ObjectDefineProperties = utils.ImportNow("ObjectDefineProperties");
+var ObjectDefineProperty = utils.ImportNow("ObjectDefineProperty");
 var RegExpTest;
 var StringIndexOf;
 var StringLastIndexOf;
@@ -55,11 +57,6 @@ utils.Import(function(from) {
   ToNumber = from.ToNumber;
 });
 
-utils.ImportNow(function(from) {
-  ObjectDefineProperties = from.ObjectDefineProperties;
-  ObjectDefineProperty = from.ObjectDefineProperty;
-});
-
 // -------------------------------------------------------------------
 
 var Intl = {};