Fix TypedArray Property optimizations

src/js/array-iterator.js

Index: src/js/array-iterator.js
diff --git a/src/js/array-iterator.js b/src/js/array-iterator.js
index b3e25e9adbe77b5d350921aadfe26572ed09e0a1..8203f1f9f5933e46727f4fab187c5e24665f2af2 100644
--- a/src/js/array-iterator.js
+++ b/src/js/array-iterator.js
@@ -22,7 +22,7 @@ var IteratorPrototype = utils.ImportNow("IteratorPrototype");
 var iteratorSymbol = utils.ImportNow("iterator_symbol");
 var MakeTypeError;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
-var GlobalTypedArray = global.Uint8Array.__proto__;
+var GlobalTypedArray = %object_get_prototype_of(global.Uint8Array);

[adamk, 2016/05/06 17:56:12]

Did we ever figure out why this had to change? It still sounds worrying to me;
I'd suggest trying reverting this change and seeing if everything works.

[Dan Ehrenberg, 2016/05/06 18:09:33]

From off-line communication, sounds like it didn't have to change, and the old
way worked. However, I think this phrasing is cleaner--it depends on less, and
requires less thinking about the state of the world to prove that it's correct.

[adamk, 2016/05/06 18:11:31]

Sounds good, and I agree that this way of spelling it is clearer.

 
 utils.Import(function(from) {
   MakeTypeError = from.MakeTypeError;