Use stricter type checks in Intl's bound methods

src/js/intl-extra.js

 // Copyright 2016 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.
 
 (function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 var GlobalIntl = global.Intl;
 
 var AddBoundMethod = utils.ImportNow("AddBoundMethod");
 var IntlParseDate = utils.ImportNow("IntlParseDate");
 var IntlParseNumber = utils.ImportNow("IntlParseNumber");
 
-AddBoundMethod(GlobalIntl.DateTimeFormat, 'v8Parse', IntlParseDate, 1);
-AddBoundMethod(GlobalIntl.NumberFormat, 'v8Parse', IntlParseNumber, 1);
+AddBoundMethod(GlobalIntl.DateTimeFormat, 'v8Parse', IntlParseDate, 1,
+               'dateformat');
+AddBoundMethod(GlobalIntl.NumberFormat, 'v8Parse', IntlParseNumber, 1,
+               'numberformat');
 
 })