Use function wrapper argument to expose internal arrays to native scripts.

src/harmony-spread.js

Index: src/harmony-spread.js
diff --git a/src/harmony-spread.js b/src/harmony-spread.js
index a523d26e38cac42a80812840d65a866f9685037a..8eade4b0e13d4751eeefd71baab8565c4af8b6e9 100644
--- a/src/harmony-spread.js
+++ b/src/harmony-spread.js
@@ -5,10 +5,16 @@
 var $spreadArguments;
 var $spreadIterable;
 
-(function(global, shared, exports) {
+(function(global, exports) {
 
 'use strict';
 
+// -------------------------------------------------------------------
+// Imports
+var InternalArray = exports.InternalArray;
+
+// -------------------------------------------------------------------
+
 function SpreadArguments() {
   var count = %_ArgumentsLength();
   var args = new InternalArray();