[promises] Remove deferred object

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 57 matching lines @@
 function PromiseIdResolveHandler(x) { return x; }
 function PromiseIdRejectHandler(r) { %_ReThrow(r); }
 SET_PRIVATE(PromiseIdRejectHandler, promiseForwardingHandlerSymbol, true);
 
 // -------------------------------------------------------------------
 // Define exported functions.
 
 // For bootstrapper.
 
 // This is used by utils and v8-extras.
-function PromiseCreate() {
-  return %promise_internal_constructor(UNDEFINED);
+function PromiseCreate(parent) {
+  return %promise_internal_constructor(parent);
 }
 
 // Only used by async-await.js
 function RejectPromise(promise, reason, debugEvent) {
   %PromiseReject(promise, reason, debugEvent);
 }
 
 // Export to bindings
 function DoRejectPromise(promise, reason) {
   %PromiseReject(promise, reason, true);
 }
 
-// The resultCapability.promise is only ever fulfilled internally,
-// so we don't need the closures to protect against accidentally
-// calling them multiple times.
-function CreateInternalPromiseCapability(parent) {
-  return {
-    promise: %promise_internal_constructor(parent),
-    resolve: UNDEFINED,
-    reject: UNDEFINED
-  };
-}
-
 // ES#sec-newpromisecapability
 // NewPromiseCapability ( C )
 function NewPromiseCapability(C, debugEvent) {
   if (C === GlobalPromise) {
     // Optimized case, avoid extra closure.
     var promise = %promise_internal_constructor(UNDEFINED);
     // TODO(gsathya): Remove container for callbacks when this is
     // moved to CPP/TF.
     var callbacks = %create_resolving_functions(promise, debugEvent);
     return {
@@ skipping 168 matching lines @@
 // Utility for debugger
 
 function PromiseHasUserDefinedRejectHandlerCheck(handler, deferred) {
   // Recurse to the forwarding Promise, if any. This may be due to
   //  - await reaction forwarding to the throwaway Promise, which has
   //    a dependency edge to the outer Promise.
   //  - PromiseIdResolveHandler forwarding to the output of .then
   //  - Promise.all/Promise.race forwarding to a throwaway Promise, which
   //    has a dependency edge to the generated outer Promise.
   if (GET_PRIVATE(handler, promiseForwardingHandlerSymbol)) {
-    return PromiseHasUserDefinedRejectHandlerRecursive(deferred.promise);
+    return PromiseHasUserDefinedRejectHandlerRecursive(deferred);
   }
 
   // Otherwise, this is a real reject handler for the Promise
   return true;
 }
 
 function PromiseHasUserDefinedRejectHandlerRecursive(promise) {
   // If this promise was marked as being handled by a catch block
   // in an async function, then it has a user-defined reject handler.
   if (GET_PRIVATE(promise, promiseHandledHintSymbol)) return true;
@@ skipping 62 matching lines @@
 
 %InstallToContext([
   "promise_catch", GlobalPromise.prototype.catch,
   "promise_create", PromiseCreate,
   "promise_has_user_defined_reject_handler", PromiseHasUserDefinedRejectHandler,
   "promise_reject", DoRejectPromise,
   // TODO(gsathya): Remove this once we update the promise builtin.
   "promise_internal_reject", RejectPromise,
   "promise_debug_get_info", PromiseDebugGetInfo,
   "new_promise_capability", NewPromiseCapability,
-  "internal_promise_capability", CreateInternalPromiseCapability,
   "promise_id_resolve_handler", PromiseIdResolveHandler,
   "promise_id_reject_handler", PromiseIdRejectHandler
 ]);
 
 // This allows extras to create promises quickly without building extra
 // resolve/reject closures, and allows them to later resolve and reject any
 // promise without having to hold on to those closures forever.
 utils.InstallFunctions(extrasUtils, 0, [
   "createPromise", PromiseCreate,
   "rejectPromise", DoRejectPromise,
   "markPromiseAsHandled", MarkPromiseAsHandled
 ]);
 
 utils.Export(function(to) {
   to.PromiseCreate = PromiseCreate;
   to.PromiseThen = PromiseThen;
 
-  to.CreateInternalPromiseCapability = CreateInternalPromiseCapability;
   to.RejectPromise = RejectPromise;
 });
 
 })