[es6] Implement Reflect.enumerate.

test/mjsunit/harmony/reflect-enumerate-opt.js

Index: test/mjsunit/harmony/reflect-enumerate-opt.js
diff --git a/test/mjsunit/for-in-opt.js b/test/mjsunit/harmony/reflect-enumerate-opt.js
similarity index 83%
copy from test/mjsunit/for-in-opt.js
copy to test/mjsunit/harmony/reflect-enumerate-opt.js
index 67ef2d870e238b16c969184632563c81f9be2a3e..34cd660c8ff0b93497e4fb322bd6de09e0b0096d 100644
--- a/test/mjsunit/for-in-opt.js
+++ b/test/mjsunit/harmony/reflect-enumerate-opt.js
@@ -2,14 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-proxies --allow-natives-syntax
+// This is adapted from mjsunit/for-in-opt.js.
+
+// Flags: --harmony-proxies --harmony-reflect --allow-natives-syntax
+
 
 "use strict";
 
-// Test non-JSObject receiver.
 function f(o) {
   var result = [];
-  for (var i in o) {
+  for (var i of Reflect.enumerate(Object(o))) {
     result.push(i);
   }
   return result;
@@ -51,7 +53,7 @@ var o = {__proto__: proxy};
 
 function f2(o) {
   var result = [];
-  for (var i in o) {
+  for (var i of Reflect.enumerate(o)) {
     result.push(i);
   }
   return result;
@@ -73,14 +75,3 @@ check_f2();
 %OptimizeFunctionOnNextCall(f2);
 deopt_has = true;
 check_f2();
-
-function f3(o) {
-  for (var i in o) {
-  }
-}
-
-f3({__proto__:{x:1}});
-f3({__proto__:{x:1}});
-%OptimizeFunctionOnNextCall(f3);
-f3(undefined);
-f3(null);