[es6] allow any LeftHandSideExpression in for-of loops

test/mjsunit/es6/for-of.js

Index: test/mjsunit/es6/for-of.js
diff --git a/test/mjsunit/es6/for-of.js b/test/mjsunit/es6/for-of.js
new file mode 100644
index 0000000000000000000000000000000000000000..b123bba5f67ce0887abcf1a6c067c57432a7c2f0
--- /dev/null
+++ b/test/mjsunit/es6/for-of.js
@@ -0,0 +1,24 @@
+// 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.
+
+(function TestForOfName() {
+  var result = 0;
+  var index;
+
+  for (index of [1, 2, 3, 4, 5]) result += index;
+
+  assertEquals(result, 15);
+  assertEquals(index, 5);
+})();
+
+
+(function TestForOfProperty() {
+  var O = {};
+  var result = 0;
+
+  for (O.index of [1, 2, 3, 4, 5]) result += O.index;
+
+  assertEquals(result, 15);
+  assertEquals(O.index, 5);
+})();