Call JS functions via native context instead of js builtins object.

src/promise.js

 // Copyright 2012 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();
 
@@ skipping 361 matching lines @@
   "race", PromiseRace,
   "resolve", PromiseCast
 ]);
 
 utils.InstallFunctions(GlobalPromise.prototype, DONT_ENUM, [
   "chain", PromiseChain,
   "then", PromiseThen,
   "catch", PromiseCatch
 ]);
 
-utils.ExportToRuntime(function(to) {
-  to["promise_catch"] = PromiseCatch;
-  to["promise_chain"] = PromiseChain;
-  to["promise_create"] = PromiseCreate;
-  to["promise_has_user_defined_reject_handler"] =
-      PromiseHasUserDefinedRejectHandler;
-  to["promise_reject"] = PromiseReject;
-  to["promise_resolve"] = PromiseResolve;
-  to["promise_then"] = PromiseThen;
-});
+%InstallToContext([
+  "promise_catch", PromiseCatch,
+  "promise_chain", PromiseChain,
+  "promise_create", PromiseCreate,
+  "promise_has_user_defined_reject_handler", PromiseHasUserDefinedRejectHandler,
+  "promise_reject", PromiseReject,
+  "promise_resolve", PromiseResolve,
+  "promise_then", PromiseThen,
+]);
 
 })