Allow eval and arguments as property names

test/mjsunit/property-name-eval-arguments.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.
+
+
+(function TestSloppyMode() {
+  var e = 1, a = 2;
+  var o = {
+    get eval() {
+      return e;
+    },
+    set eval(v) {
+      e = v;
+    },
+    get arguments() {
+      return a;
+    },
+    set arguments(v) {
+      a = v;
+    },
+  };
+
+  assertEquals(1, o.eval);
+  o.eval = 3;
+  assertEquals(3, e);
+
+  assertEquals(2, o.arguments);
+  o.arguments = 4;
+  assertEquals(4, a);
+})();
+
+
+(function TestStrictMode() {
+  'use strict';
+
+  var e = 1, a = 2;
+  var o = {
+    get eval() {
+      return e;
+    },
+    set eval(v) {
+      e = v;
+    },
+    get arguments() {
+      return a;
+    },
+    set arguments(v) {
+      a = v;
+    },
+  };
+
+  assertEquals(1, o.eval);
+  o.eval = 3;
+  assertEquals(3, e);
+
+  assertEquals(2, o.arguments);
+  o.arguments = 4;
+  assertEquals(4, a);
+})();