[builtins] Add ReturnReceiver builtin

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();
 
 // -------------------------------------------------------------------
 // Imports
 
 var InternalArray = utils.InternalArray;
 var promiseAsyncStackIDSymbol =
     utils.ImportNow("promise_async_stack_id_symbol");
 var promiseHandledBySymbol =
     utils.ImportNow("promise_handled_by_symbol");
 var promiseForwardingHandlerSymbol =
     utils.ImportNow("promise_forwarding_handler_symbol");
 var promiseHandledHintSymbol =
     utils.ImportNow("promise_handled_hint_symbol");
 var promiseRawSymbol = utils.ImportNow("promise_raw_symbol");
 var promiseStateSymbol = utils.ImportNow("promise_state_symbol");
 var promiseResultSymbol = utils.ImportNow("promise_result_symbol");
-var SpeciesConstructor;
-var speciesSymbol = utils.ImportNow("species_symbol");
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 var ObjectHasOwnProperty;
 var GlobalPromise = global.Promise;
 var PromiseThen = GlobalPromise.prototype.then;
 
 utils.Import(function(from) {
   ObjectHasOwnProperty = from.ObjectHasOwnProperty;
-  SpeciesConstructor = from.SpeciesConstructor;
 });
 
 // -------------------------------------------------------------------
 
 // Core functionality.
 
 function PromiseDebugGetInfo(deferreds, status) {
   var id, name, instrumenting = DEBUG_IS_ACTIVE;
 
   if (instrumenting) {
@@ skipping 290 matching lines @@
 // This function also traverses dependencies of one Promise on another,
 // set up through async/await and Promises resolved with Promises.
 function PromiseHasUserDefinedRejectHandler() {
   return PromiseHasUserDefinedRejectHandlerRecursive(this);
 };
 
 function MarkPromiseAsHandled(promise) {
   %PromiseMarkAsHandled(promise);
 }
 
-
-function PromiseSpecies() {
-  return this;
-}
-
 // -------------------------------------------------------------------
 // Install exported functions.
 
 utils.InstallFunctions(GlobalPromise, DONT_ENUM, [
   "reject", PromiseReject,
   "all", PromiseAll,
   "race", PromiseRace,
   "resolve", PromiseResolve
 ]);
 
-utils.InstallGetter(GlobalPromise, speciesSymbol, PromiseSpecies);
-
 %SetCode(GlobalPromise.prototype.catch, PromiseCatch);
 
 %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,
@@ skipping 14 matching lines @@
 
 utils.Export(function(to) {
   to.PromiseCreate = PromiseCreate;
   to.PromiseThen = PromiseThen;
 
   to.CreateInternalPromiseCapability = CreateInternalPromiseCapability;
   to.RejectPromise = RejectPromise;
 });
 
 })