Revert of Revert of Wrap runtime.js in a function.

src/array-iterator.js

Index: src/array-iterator.js
diff --git a/src/array-iterator.js b/src/array-iterator.js
index 45a432ef51cd0396dd0ee96bba98258b24368c23..5e69b23293e9b845e24b81e398a23b940f99bb31 100644
--- a/src/array-iterator.js
+++ b/src/array-iterator.js
@@ -47,7 +47,7 @@
 
 // 15.4.5.1 CreateArrayIterator Abstract Operation
 function CreateArrayIterator(array, kind) {
-  var object = ToObject(array);
+  var object = $toObject(array);
   var iterator = new ArrayIterator;
   SET_PRIVATE(iterator, arrayIteratorObjectSymbol, object);
   SET_PRIVATE(iterator, arrayIteratorNextIndexSymbol, 0);
@@ -70,7 +70,7 @@
 
 // 15.4.5.2.2 ArrayIterator.prototype.next( )
 function ArrayIteratorNext() {
-  var iterator = ToObject(this);
+  var iterator = $toObject(this);
 
   if (!HAS_DEFINED_PRIVATE(iterator, arrayIteratorNextIndexSymbol)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,