Fix cached EnumLength retrieval in JSObject::NumberOfOwnProperties

test/mjsunit/regress/regress-crbug-549162.js

Index: test/mjsunit/regress/regress-crbug-549162.js
diff --git a/test/mjsunit/regress/regress-crbug-549162.js b/test/mjsunit/regress/regress-crbug-549162.js
new file mode 100644
index 0000000000000000000000000000000000000000..072bdd52d9e9822eec3509dc8486e55790f4d56d
--- /dev/null
+++ b/test/mjsunit/regress/regress-crbug-549162.js
@@ -0,0 +1,11 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var s = Symbol("foo");
+var __v_13 = {}
+Object.defineProperty( __v_13, s, {value: {}, enumerable: true});
+for (var __v_14 in __v_13) {}
+__v_13 = {}
+Object.defineProperty( __v_13, s, {value: {}, enumerable: true});
+var __v_14 = Object.create(Object.prototype, __v_13)