[promises] move most of FulfillPromise to c++

src/js/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, extrasUtils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 125 matching lines @@
   // If debug is active, notify about the newly created promise first.
   if (DEBUG_IS_ACTIVE) PromiseSet(promise, kPending, UNDEFINED);
   return PromiseSet(promise, status, value);
 }
 
 function PromiseInit(promise) {
   return PromiseSet(promise, kPending, UNDEFINED);
 }
 
 function FulfillPromise(promise, status, value, promiseQueue) {
-  var tasks = GET_PRIVATE(promise, promiseQueue);
-  if (!IS_UNDEFINED(tasks)) {
-    var deferred = GET_PRIVATE(promise, promiseDeferredReactionSymbol);
-    %EnqueuePromiseReactionJob(value, tasks, deferred, status);
-  }
+  %PromiseFulfill(promise, status, value, promiseQueue);
   PromiseSet(promise, status, value);
 }
 
 function PromiseHandle(value, handler, deferred) {
   var debug_is_active = DEBUG_IS_ACTIVE;
   try {
     if (debug_is_active) %DebugPushPromise(deferred.promise);
     var result = handler(value);
     if (IS_UNDEFINED(deferred.resolve)) {
       ResolvePromise(deferred.promise, result);
@@ skipping 515 matching lines @@
   to.PromiseThen = PromiseThen;
 
   to.GlobalPromise = GlobalPromise;
   to.NewPromiseCapability = NewPromiseCapability;
   to.PerformPromiseThen = PerformPromiseThen;
   to.ResolvePromise = ResolvePromise;
   to.RejectPromise = RejectPromise;
 });
 
 })