Use new.target in favor of %_IsConstructCall intrinsic (1).

src/js/collection.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 107 matching lines @@
   }
   return hash;
 }
 %SetForceInlineFlag(GetHash);
 
 
 // -------------------------------------------------------------------
 // Harmony Set
 
 function SetConstructor(iterable) {
-  if (!%_IsConstructCall()) {
+  if (IS_UNDEFINED(new.target)) {
     throw MakeTypeError(kConstructorNotFunction, "Set");
   }
 
   %_SetInitialize(this);
 
   if (!IS_NULL_OR_UNDEFINED(iterable)) {
     var adder = this.add;
     if (!IS_CALLABLE(adder)) {
       throw MakeTypeError(kPropertyNotFunction, 'add', this);
     }
@@ skipping 135 matching lines @@
   "delete", SetDelete,
   "clear", SetClearJS,
   "forEach", SetForEach
 ]);
 
 
 // -------------------------------------------------------------------
 // Harmony Map
 
 function MapConstructor(iterable) {
-  if (!%_IsConstructCall()) {
+  if (IS_UNDEFINED(new.target)) {
     throw MakeTypeError(kConstructorNotFunction, "Map");
   }
 
   %_MapInitialize(this);
 
   if (!IS_NULL_OR_UNDEFINED(iterable)) {
     var adder = this.set;
     if (!IS_CALLABLE(adder)) {
       throw MakeTypeError(kPropertyNotFunction, 'set', this);
     }
@@ skipping 174 matching lines @@
   "set_has", SetHas,
   "set_delete", SetDelete,
 ]);
 
 utils.Export(function(to) {
   to.GetExistingHash = GetExistingHash;
   to.GetHash = GetHash;
 });
 
 })