Tentatively reenable previous failing test.

R=mstarzinger@chromium.org
BUG=v8:2261

Review URL: https://chromiumcodereview.appspot.com/10907254

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12530 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/object-define-property.js

@@ -1057,8 +1057,6 @@ assertEquals(999, o[999]);
 
 
 // Regression test: Bizzare behavior on non-strict arguments object.
-// TODO(yangguo): Tests disabled, needs investigation!
-/*
 (function test(arg0) {
   // Here arguments[0] is a fast alias on arg0.
   Object.defineProperty(arguments, "0", {
@@ -1077,7 +1075,7 @@ assertEquals(999, o[999]);
   assertEquals(2, arg0);
   assertEquals(3, arguments[0]);
 })(0);
-*/
+
 
 // Regression test: We should never observe the hole value.
 var objectWithGetter = {};