Revert of [proxies] Make Object.prototype.isPrototypeOf work with proxies.

test/mjsunit/harmony/proxies-get-prototype-of.js

Index: test/mjsunit/harmony/proxies-get-prototype-of.js
diff --git a/test/mjsunit/harmony/proxies-get-prototype-of.js b/test/mjsunit/harmony/proxies-get-prototype-of.js
index 36f67356d556d39c06253f9e68ce3ee9105ed6d9..364f5328f4fc173a406a1b94e5bdd942dc288b62 100644
--- a/test/mjsunit/harmony/proxies-get-prototype-of.js
+++ b/test/mjsunit/harmony/proxies-get-prototype-of.js
@@ -36,58 +36,3 @@
 }, {});
 var proxy3 = new Proxy(target, handler_proxy);
 assertSame(Object.getPrototypeOf(proxy3), proxy3_prototype);
-
-
-// Some tests with Object.prototype.isPrototypeOf
-
-(function () {
-  var object = {};
-  var handler = {};
-  var proto = new Proxy({}, handler);
-  object.__proto__ = proto;
-
-  assertTrue(proto.isPrototypeOf(object));
-  assertTrue(Object.prototype.isPrototypeOf.call(proto, object));
-
-  handler.getPrototypeOf = function () { return Object.prototype };
-  assertTrue(proto.isPrototypeOf(object));
-  assertTrue(Object.prototype.isPrototypeOf.call(proto, object));
-  assertTrue(Object.prototype.isPrototypeOf(object));
-  assertFalse(Object.prototype.isPrototypeOf.call(Array.prototype, object));
-  assertFalse(Array.prototype.isPrototypeOf(object));
-
-  handler.getPrototypeOf = function () { return object };
-  assertTrue(Object.prototype.isPrototypeOf.call(proto, object));
-  assertTrue(proto.isPrototypeOf(object));
-  assertTrue(Object.prototype.isPrototypeOf.call(object, object));
-  assertTrue(object.isPrototypeOf(object));
-
-  handler.getPrototypeOf = function () { throw "foo" };
-  assertTrue(proto.isPrototypeOf(object));
-  assertTrue(Object.prototype.isPrototypeOf.call(proto, object));
-  assertThrows(()=> Object.prototype.isPrototypeOf(object));
-  assertThrows(()=> Object.prototype.isPrototypeOf.call(Array.prototype, object));
-  assertThrows(()=> Array.prototype.isPrototypeOf(object));
-})();
-
-(function () {
-  var handler = {};
-  var object = new Proxy({}, handler);
-  var proto = {};
-
-  assertFalse(Object.prototype.isPrototypeOf.call(object, object));
-  assertFalse(Object.prototype.isPrototypeOf.call(proto, object));
-  assertTrue(Object.prototype.isPrototypeOf.call(Object.prototype, object));
-
-  handler.getPrototypeOf = function () { return proto };
-  assertTrue(Object.prototype.isPrototypeOf.call(proto, object));
-  assertFalse(Object.prototype.isPrototypeOf.call({}, object));
-  assertTrue(Object.prototype.isPrototypeOf.call(Object.prototype, object));
-
-  handler.getPrototypeOf = function () { return object };
-  assertTrue(Object.prototype.isPrototypeOf.call(object, object));
-
-  handler.getPrototypeOf = function () { throw "foo" };
-  assertThrows(()=> Object.prototype.isPrototypeOf.call(object, object));
-  assertThrows(()=> Object.prototype.isPrototypeOf(object));
-})();