Revert r14310 due to isolate tests failure.

test/mjsunit/bugs/bug-proto.js

-// Copyright 2013 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-var realmA = Realm.current();
-var realmB = Realm.create();
-assertEquals(0, realmA);
-assertEquals(1, realmB);
-
-// The global objects match the realms' this binding.
-assertSame(this, Realm.global(realmA));
-assertSame(Realm.eval(realmB, "this"), Realm.global(realmB));
-assertFalse(this === Realm.global(realmB));
-
-// The global object is not accessible cross-realm.
-var x = 3;
-Realm.shared = this;
-assertThrows("Realm.eval(realmB, 'x')");
-assertSame(undefined, Realm.eval(realmB, "this.x"));
-assertSame(undefined, Realm.eval(realmB, "Realm.shared.x"));
-
-Realm.eval(realmB, "Realm.global(0).y = 1");
-assertThrows("y");
-assertSame(undefined, this.y);
-
-// Can get or set other objects' properties cross-realm.
-var p = {a: 1};
-var o = {__proto__: p, b: 2};
-Realm.shared = o;
-assertSame(1, Realm.eval(realmB, "Realm.shared.a"));
-assertSame(2, Realm.eval(realmB, "Realm.shared.b"));
-
-// Cannot get or set a prototype cross-realm.
-assertSame(undefined, Realm.eval(realmB, "Realm.shared.__proto__"));
-
-Realm.eval(realmB, "Realm.shared.__proto__ = {c: 3}");
-assertSame(1, o.a);
-assertSame(undefined, o.c);