Move error message makers off js builtins object.

src/js/collection-iterator.js

Index: src/js/collection-iterator.js
diff --git a/src/js/collection-iterator.js b/src/js/collection-iterator.js
index 4367c66aa1cd1718e76f721de48398003cab8925..621d7266fc69bdeffb2d6d8cd949c062346d66c9 100644
--- a/src/js/collection-iterator.js
+++ b/src/js/collection-iterator.js
@@ -8,13 +8,21 @@
 
 %CheckIsBootstrapping();
 
+// -------------------------------------------------------------------
+// Imports
+
 var GlobalMap = global.Map;
 var GlobalSet = global.Set;
 var iteratorSymbol = utils.ImportNow("iterator_symbol");
+var MakeTypeError;
 var MapIterator = utils.ImportNow("MapIterator");
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 var SetIterator = utils.ImportNow("SetIterator");
 
+utils.Import(function(from) {
+  MakeTypeError = from.MakeTypeError;
+});
+
 // -------------------------------------------------------------------
 
 function SetIteratorConstructor(set, kind) {