[es6] Introduce %ToInteger and %ToLength.

src/harmony-array-includes.js

 // Copyright 2014 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();
 
 var GlobalArray = global.Array;
 
 // -------------------------------------------------------------------
 
 // Proposed for ES7
 // https://github.com/tc39/Array.prototype.includes
 // 46c7532ec8499dea3e51aeb940d09e07547ed3f5
 function InnerArrayIncludes(searchElement, fromIndex, array, length) {
   if (length === 0) {
     return false;
   }
 
-  var n = $toInteger(fromIndex);
+  var n = TO_INTEGER(fromIndex);
 
   var k;
   if (n >= 0) {
     k = n;
   } else {
     k = length + n;
     if (k < 0) {
       k = 0;
     }
   }
 
   while (k < length) {
     var elementK = array[k];
     if ($sameValueZero(searchElement, elementK)) {
       return true;
     }
 
     ++k;
   }
 
   return false;
 }
 
 
 function ArrayIncludes(searchElement, fromIndex) {
   CHECK_OBJECT_COERCIBLE(this, "Array.prototype.includes");
 
   var array = TO_OBJECT(this);
-  var length = $toLength(array.length);
+  var length = TO_LENGTH(array.length);
 
   return InnerArrayIncludes(searchElement, fromIndex, array, length);
 }
 
 
 function TypedArrayIncludes(searchElement, fromIndex) {
   if (!%_IsTypedArray(this)) throw MakeTypeError(kNotTypedArray);
 
   var length = %_TypedArrayGetLength(this);
 
@@ skipping 36 matching lines @@
 // Set up non-enumerable functions on the prototype object.
 utils.InstallFunctions(GlobalNAME.prototype, DONT_ENUM, [
   "includes", TypedArrayIncludes
 ]);
 endmacro
 
 TYPED_ARRAYS(DECLARE_GLOBALS)
 TYPED_ARRAYS(EXTEND_TYPED_ARRAY)
 
 })