Fix for-in for large indexes and indexes on proxies

test/mjsunit/harmony/proxies-for.js

Index: test/mjsunit/harmony/proxies-for.js
diff --git a/test/mjsunit/harmony/proxies-for.js b/test/mjsunit/harmony/proxies-for.js
index d0f2a022fd176b1f548e69cbf8bc5edc7651a9d7..ea162496ba483f8d46739f3dff6386e1d989bc07 100644
--- a/test/mjsunit/harmony/proxies-for.js
+++ b/test/mjsunit/harmony/proxies-for.js
@@ -165,4 +165,13 @@ TestForInThrow(Proxy.create({
   get: function(pr, pk) {
     return function() { throw "myexn" }
   }
-}))
+}));
+
+(function() {
+  var p = Proxy.create({enumerate:function() { return [0]; }});
+  var o = [0];
+  o.__proto__ = p;
+  var keys = [];
+  for (var k in o) { keys.push(k); };
+  assertEquals(["0"], keys);
+})();