[stubs] Unify (and optimize) implementation of ToObject.

src/array-iterator.js

 // Copyright 2013 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.
 
 var $arrayValues;
 
 (function(global, utils) {
 
 "use strict";
 
@@ skipping 27 matching lines @@
 function ArrayIterator() {}
 
 
 // TODO(wingo): Update section numbers when ES6 has stabilized.  The
 // section numbers below are already out of date as of the May 2014
 // draft.
 
 
 // 15.4.5.1 CreateArrayIterator Abstract Operation
 function CreateArrayIterator(array, kind) {
-  var object = $toObject(array);
+  var object = TO_OBJECT(array);
   var iterator = new ArrayIterator;
   SET_PRIVATE(iterator, arrayIteratorObjectSymbol, object);
   SET_PRIVATE(iterator, arrayIteratorNextIndexSymbol, 0);
   SET_PRIVATE(iterator, arrayIterationKindSymbol, kind);
   return iterator;
 }
 
 
 // 15.19.4.3.4 CreateItrResultObject
 function CreateIteratorResultObject(value, done) {
   return {value: value, done: done};
 }
 
 
 // 22.1.5.2.2 %ArrayIteratorPrototype%[@@iterator]
 function ArrayIteratorIterator() {
     return this;
 }
 
 
 // 15.4.5.2.2 ArrayIterator.prototype.next( )
 function ArrayIteratorNext() {
-  var iterator = $toObject(this);
+  var iterator = TO_OBJECT(this);
 
   if (!HAS_DEFINED_PRIVATE(iterator, arrayIteratorNextIndexSymbol)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
                         'Array Iterator.prototype.next', this);
   }
 
   var array = GET_PRIVATE(iterator, arrayIteratorObjectSymbol);
   if (IS_UNDEFINED(array)) {
     return CreateIteratorResultObject(UNDEFINED, true);
   }
@@ skipping 76 matching lines @@
 // -------------------------------------------------------------------
 // Exports
 
 utils.Export(function(to) {
   to.ArrayIteratorCreateResultObject = CreateIteratorResultObject;
 });
 
 $arrayValues = ArrayValues;
 
 })