Tentatively reenable previous failing test.

test/mjsunit/object-define-property.js

Index: test/mjsunit/object-define-property.js
diff --git a/test/mjsunit/object-define-property.js b/test/mjsunit/object-define-property.js
index 970a80334971142dce997beb2f0d4e4b717d0329..6771412eb6d9167c9ec0f7ecf740325ce953953f 100644
--- a/test/mjsunit/object-define-property.js
+++ b/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 = {};