Install iterator meta objects via utils object.

src/js/array.js

Index: src/js/array.js
diff --git a/src/js/array.js b/src/js/array.js
index e8e5197d66b61fe435a12fa92516712b45f7ee39..4b994e272ad47e26bbcf7a6f56f27d50b9b23a9f 100644
--- a/src/js/array.js
+++ b/src/js/array.js
@@ -12,6 +12,7 @@
 // Imports
 
 var Delete;
+var FLAG_harmony_tolength;
 var GlobalArray = global.Array;
 var InternalArray = utils.InternalArray;
 var InternalPackedArray = utils.InternalPackedArray;
@@ -37,6 +38,10 @@ utils.Import(function(from) {
   ObserveEnqueueSpliceRecord = from.ObserveEnqueueSpliceRecord;
 });
 
+utils.ImportFromExperimental(function(from) {
+  FLAG_harmony_tolength = from.FLAG_harmony_tolength;
+});
+
 // -------------------------------------------------------------------
 
 // Global list of arrays visited during toString, toLocaleString and