Remove runtime flags for Proxy and Reflect

test/mjsunit/harmony/proxies-has-own-property.js

-// 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.
-
-// Flags: --harmony-proxies
-
-var handler = {};
-var target = {a:1};
-var proxy = new Proxy(target, handler);
-
-assertTrue(target.hasOwnProperty('a'));
-assertTrue(proxy.hasOwnProperty('a'));
-assertFalse(target.hasOwnProperty('b'));
-assertFalse(proxy.hasOwnProperty('b'));
-
-
-handler.has = function() { assertUnreachable() }
-handler.getOwnPropertyDescriptor = function () {}
-
-assertTrue(target.hasOwnProperty('a'));
-assertFalse(proxy.hasOwnProperty('a'));
-assertFalse(target.hasOwnProperty('b'));
-assertFalse(proxy.hasOwnProperty('b'));
-
-
-handler.getOwnPropertyDescriptor = function() { return {configurable: true} }
-
-assertTrue(target.hasOwnProperty('a'));
-assertTrue(proxy.hasOwnProperty('a'));
-assertFalse(target.hasOwnProperty('b'));
-assertTrue(proxy.hasOwnProperty('b'));
-
-
-handler.getOwnPropertyDescriptor = function() { throw Error(); }
-
-assertTrue(target.hasOwnProperty('a'));
-assertThrows(function(){ proxy.hasOwnProperty('a') }, Error);
-assertFalse(target.hasOwnProperty('b'));
-assertThrows(function(){ proxy.hasOwnProperty('b') }, Error);