Revert of Lazily register prototype users

test/mjsunit/prototype-changes.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: --allow-natives-syntax
-
-function A() {
-  this.a = "a";
-}
-var a = new A();
-
-function B() {
-  this.b = "b";
-}
-B.prototype = a;
-
-function C() {
-  this.c = "c";
-}
-C.prototype = new B();
-
-var c = new C();
-
-function f(expected) {
-  var result = c.z;
-  assertEquals(expected, result);
-}
-f(undefined);
-f(undefined);
-%OptimizeFunctionOnNextCall(f);
-f(undefined);
-a.z = "z";
-f("z");
-f("z");
-
-// Test updating .__proto__ pointers.
-var p1 = {foo: 1.5};
-var p2 = {}; p2.__proto__ = p1;
-var p3 = {}; p3.__proto__ = p2;
-var o = {}; o.__proto__ = p3;
-
-for (var i = 0; i < 2; i++) o.foo;  // Force registration.
-
-var p1a = {foo: 1.7};
-p2.__proto__ = p1a;
-
-function g(o, expected) {
-  var result = o.foo;
-  assertEquals(expected, result);
-}
-
-g(o, 1.7);
-g(o, 1.7);
-g(o, 1.7);
-Object.defineProperty(p1a, "foo", {get: function() { return "foo"}});
-g(o, "foo");