[es6] Remove left-overs from Function.prototype.toMethod.

test/mjsunit/es6/toMethod.js

-// Copyright 2014 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 TestSingleClass() {
-  function f(x) {
-    var a = [0, 1, 2]
-    return a[x];
-  }
-
-  function ClassD() { }
-
-  assertEquals(1, f(1));
-  var g = %ToMethod(f, ClassD.prototype);
-  assertEquals(1, g(1));
-  assertEquals(undefined, f[%HomeObjectSymbol()]);
-  assertEquals(ClassD.prototype, g[%HomeObjectSymbol()]);
-}());
-
-
-(function TestClassHierarchy() {
-  function f(x) {
-    return function g(y)  { x++; return x + y; };
-  }
-
-  function Base() {}
-  function Derived() { }
-  Derived.prototype = Object.create(Base.prototype);
-
-  var q = f(0);
-  assertEquals(2, q(1));
-  assertEquals(3, q(1));
-  var g = %ToMethod(q, Derived.prototype);
-  assertFalse(g === q);
-  assertEquals(4, g(1));
-  assertEquals(5, q(1));
-}());
-
-
-(function TestPrototypeChain() {
-  var o = {};
-  var o1 = {};
-  function f() { }
-
-  function g() { }
-
-  var fMeth = %ToMethod(f, o);
-  assertEquals(o, fMeth[%HomeObjectSymbol()]);
-  g.__proto__ = fMeth;
-  assertEquals(undefined, g[%HomeObjectSymbol()]);
-  var gMeth = %ToMethod(g, o1);
-  assertEquals(fMeth, gMeth.__proto__);
-  assertEquals(o, fMeth[%HomeObjectSymbol()]);
-  assertEquals(o1, gMeth[%HomeObjectSymbol()]);
-}());
-
-
-(function TestBoundFunction() {
-  var o = {};
-  var p = {};
-
-
-  function f(x, y, z, w) {
-    assertEquals(o, this);
-    assertEquals(1, x);
-    assertEquals(2, y);
-    assertEquals(3, z);
-    assertEquals(4, w);
-    return x+y+z+w;
-  }
-
-  var fBound = f.bind(o, 1, 2, 3);
-  var fMeth = %ToMethod(fBound, p);
-  assertEquals(10, fMeth(4));
-  assertEquals(10, fMeth.call(p, 4));
-  var fBound1 = fBound.bind(o, 4);
-  assertEquals(10, fBound1());
-  var fMethBound = fMeth.bind(o, 4);
-  assertEquals(10, fMethBound());
-}());
-
-(function TestOptimized() {
-  function f(o) {
-    return o.x;
-  }
-  var o = {x : 15};
-  assertEquals(15, f(o));
-  assertEquals(15, f(o));
-  %OptimizeFunctionOnNextCall(f);
-  assertEquals(15, f(o));
-  var g = %ToMethod(f, {});
-  var o1 = {y : 1024, x : "abc"};
-  assertEquals("abc", f(o1));
-  assertEquals("abc", g(o1));
-} ());
-
-(function TestExtensibility() {
-  function f() {}
-  Object.preventExtensions(f);
-  assertFalse(Object.isExtensible(f));
-  var m = %ToMethod(f, {});
-  assertTrue(Object.isExtensible(m));
-}());