Unstage non-standard Promise functions

test/mjsunit/messages.js

 // Copyright 2015 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.
 
 // Flags: --stack-size=100 --harmony --harmony-reflect --harmony-regexps
 // Flags: --harmony-simd --strong-mode
 
 function test(f, expected, type) {
   try {
     f();
@@ skipping 152 matching lines @@
   var obj = {};
   obj[Symbol.iterator] = function() { return { next: function() { return 1 }}};
   Array.from(obj);
 }, "Iterator result 1 is not an object", TypeError);
 
 // kIteratorValueNotAnObject
 test(function() {
   new Map([1]);
 }, "Iterator value 1 is not an entry object", TypeError);
 
-// kNotAPromise
-test(function() {
-  Promise.prototype.chain.call(1);
-}, "1 is not a promise", TypeError);
-
 // kNotConstructor
 test(function() {
   new Symbol();
 }, "Symbol is not a constructor", TypeError);
 
 // kNotDateObject
 test(function() {
   Date.prototype.setHours.call(1);
 }, "this is not a Date object.", TypeError);
 
@@ skipping 270 matching lines @@
   Number(1).toString(100);
 }, "toString() radix argument must be between 2 and 36", RangeError);
 
 
 // === URIError ===
 
 // kURIMalformed
 test(function() {
   decodeURI("%%");
 }, "URI malformed", URIError);