Use InternalArray in Object.getOwnPropertyNames() implementation

src/array.js

Index: src/array.js
diff --git a/src/array.js b/src/array.js
index 9b0bfe19e6a25f25936901c5d206dffe54cad007..493ee6d4222460936aac84e4639a946017cf91e3 100644
--- a/src/array.js
+++ b/src/array.js
@@ -1553,6 +1553,7 @@ function SetUpArray() {
   // exposed to user code.
   // Adding only the functions that are actually used.
   SetUpLockedPrototype(InternalArray, $Array(), $Array(
+    "concat", getFunction("concat", ArrayConcat),

[Vyacheslav Egorov (Google), 2013/02/26 01:21:33]

concat will return a normal Array, thus if you are doing several concats in a
row then only the first one is protected, the rest can be replaced.

(can happen in interceptor case).

[adamk, 2013/02/26 01:44:53]

I think this is enough reason to take another approach here; Michael, you can
hold off on reviewing until I ping this back again.

     "indexOf", getFunction("indexOf", ArrayIndexOf),
     "join", getFunction("join", ArrayJoin),
     "pop", getFunction("pop", ArrayPop),