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

test/mjsunit/regress/regress-1878.js

Index: test/mjsunit/regress/regress-1878.js
diff --git a/test/mjsunit/regress/regress-1878.js b/test/mjsunit/regress/regress-1878.js
index fbc47bdd1463d09d67220cd640eb96c56b57d1c7..2889415fac8ebabab91721a80232822c705acc1f 100644
--- a/test/mjsunit/regress/regress-1878.js
+++ b/test/mjsunit/regress/regress-1878.js
@@ -32,13 +32,13 @@
 var a = Array();
 
 for (var i = 0; i < 1000; i++) {
-  var ai = natives.InternalArray(10000);
+  var ai = natives.shared.InternalArray(10000);
   assertFalse(%HaveSameMap(ai, a));
   assertTrue(%HasFastObjectElements(ai));
 }
 
 for (var i = 0; i < 1000; i++) {
-  var ai = new natives.InternalArray(10000);
+  var ai = new natives.shared.InternalArray(10000);
   assertFalse(%HaveSameMap(ai, a));
   assertTrue(%HasFastObjectElements(ai));
 }