Clean up builtins export whitelist.

src/js/prologue.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.
 
 (function(global, utils, extrasUtils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 163 matching lines @@
 
 function PostNatives(utils) {
   %CheckIsBootstrapping();
 
   for ( ; !IS_UNDEFINED(imports); imports = imports.next) {
     imports(exports_container);
   }
 
   // Whitelist of exports from normal natives to experimental natives and debug.
   var expose_list = [
-    "ArrayToString",
     "FormatDateToParts",
-    "GetIterator",
-    "GetMethod",
     "MapEntries",
     "MapIterator",
     "MapIteratorNext",
     "MaxSimple",
     "MinSimple",
     "SetIterator",
     "SetIteratorNext",
     "SetValues",
     "ToLocaleLowerCaseI18N",
     "ToLocaleUpperCaseI18N",
     "ToLowerCaseI18N",
-    "ToPositiveInteger",
     "ToUpperCaseI18N",
     // From runtime:
-    "is_concat_spreadable_symbol",
-    "iterator_symbol",
-    "object_freeze",
-    "object_is_frozen",
-    "object_is_sealed",
     "promise_result_symbol",
     "promise_state_symbol",
     "reflect_apply",
-    "reflect_construct",
     "to_string_tag_symbol",
-    "object_to_string",
-    "species_symbol",
-    "match_symbol",
-    "replace_symbol",
-    "search_symbol",
-    "split_symbol",
   ];
 
   var filtered_exports = {};
   %OptimizeObjectForAddingMultipleProperties(
       filtered_exports, expose_list.length);
   for (var key of expose_list) {
     filtered_exports[key] = exports_container[key];
   }
   %ToFastProperties(filtered_exports);
   exports_container = filtered_exports;
@@ skipping 106 matching lines @@
 
 extrasUtils.uncurryThis = function uncurryThis(func) {
   return function(thisArg, ...args) {
     return %reflect_apply(func, thisArg, args);
   };
 };
 
 %ToFastProperties(extrasUtils);
 
 })