Tentatively reenable previous failing test.

test/mjsunit/object-define-property.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1038 matching lines @@
 
 // Regression test: Ensure that growing dictionaries are not ignored.
 o = {};
 for (var i = 0; i < 1000; i++) {
   // Non-enumerable property forces dictionary mode.
   Object.defineProperty(o, i, {value: i, enumerable: false});
 }
 assertEquals(999, o[999]);
 
 
-// Regression test: Bizzare behavior on non-strict arguments object.

[Michael Starzinger, 2012/09/17 14:15:56]

Can we keep the original comment?

-// TODO(yangguo): Tests disabled, needs investigation!
-/*
 (function test(arg0) {
   // Here arguments[0] is a fast alias on arg0.
   Object.defineProperty(arguments, "0", {
     value:1,
     enumerable:false
   });
   // Here arguments[0] is a slow alias on arg0.
   Object.defineProperty(arguments, "0", {
     value:2,
     writable:false
   });
   // Here arguments[0] is no alias at all.
   Object.defineProperty(arguments, "0", {
     value:3
   });
   assertEquals(2, arg0);
   assertEquals(3, arguments[0]);
 })(0);
-*/
+
 
 // Regression test: We should never observe the hole value.
 var objectWithGetter = {};
 objectWithGetter.__defineGetter__('foo', function() {});
 assertEquals(undefined, objectWithGetter.__lookupSetter__('foo'));
 
 var objectWithSetter = {};
 objectWithSetter.__defineSetter__('foo', function(x) {});
 assertEquals(undefined, objectWithSetter.__lookupGetter__('foo'));
 
@@ skipping 92 matching lines @@
   o.blubb = 123;
 }
 
 function C() {}
 
 Assign(new C);
 Assign(new C);
 %OptimizeFunctionOnNextCall(Assign);
 Object.defineProperty(C.prototype, "blubb", {get: function() { return -42; }});
 Assign(new C);