Use the LookupIterator for SetElement and friends

src/array.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.
 
 var $arrayConcat;
 var $arrayPush;
 var $arrayPop;
 var $arrayShift;
 var $arraySlice;
 var $arraySplice;
@@ skipping 225 matching lines @@
 // This function implements the optimized splice implementation that can use
 // special array operations to handle sparse arrays in a sensible fashion.
 function SparseSlice(array, start_i, del_count, len, deleted_elements) {
   // Move deleted elements to a new array (the return value from splice).
   var indices = %GetArrayKeys(array, start_i + del_count);
   if (IS_NUMBER(indices)) {
     var limit = indices;
     for (var i = start_i; i < limit; ++i) {
       var current = array[i];
       if (!IS_UNDEFINED(current) || i in array) {
-        %AddElement(deleted_elements, i - start_i, current, NONE);
+        %AddElement(deleted_elements, i - start_i, current);
       }
     }
   } else {
     var length = indices.length;
     for (var k = 0; k < length; ++k) {
       var key = indices[k];
       if (!IS_UNDEFINED(key)) {
         if (key >= start_i) {
           var current = array[key];
           if (!IS_UNDEFINED(current) || key in array) {
-            %AddElement(deleted_elements, key - start_i, current, NONE);
+            %AddElement(deleted_elements, key - start_i, current);
           }
         }
       }
     }
   }
 }
 
 
 // This function implements the optimized splice implementation that can use
 // special array operations to handle sparse arrays in a sensible fashion.
@@ skipping 61 matching lines @@
 // because the receiver is not an array (so we have no choice) or because we
 // know we are not deleting or moving a lot of elements.
 function SimpleSlice(array, start_i, del_count, len, deleted_elements) {
   var is_array = IS_ARRAY(array);
   for (var i = 0; i < del_count; i++) {
     var index = start_i + i;
     if (HAS_INDEX(array, index, is_array)) {
       var current = array[index];
       // The spec requires [[DefineOwnProperty]] here, %AddElement is close
       // enough (in that it ignores the prototype).
-      %AddElement(deleted_elements, i, current, NONE);
+      %AddElement(deleted_elements, i, current);
     }
   }
 }
 
 
 function SimpleMove(array, start_i, del_count, len, num_additional_args) {
   var is_array = IS_ARRAY(array);
   if (num_additional_args !== del_count) {
     // Move the existing elements after the elements to be deleted
     // to the right position in the resulting array.
@@ skipping 1344 matching lines @@
 
 $arrayConcat = ArrayConcatJS;
 $arrayPush = ArrayPush;
 $arrayPop = ArrayPop;
 $arrayShift = ArrayShift;
 $arraySlice = ArraySlice;
 $arraySplice = ArraySplice;
 $arrayUnshift = ArrayUnshift;
 
 });