Adapt to latest spec changes for Proxy.create[Function].

test/mjsunit/harmony/proxies.js

 // Copyright 2011 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
@@ skipping 1450 matching lines @@
 
 
 
 // Prototype (Object.getPrototypeOf, Object.prototype.isPrototypeOf).
 
 function TestPrototype() {
   var o1 = {}
   var p1 = Proxy.create({})
   var p2 = Proxy.create({}, o1)
   var p3 = Proxy.create({}, p2)
-  var p4 = Proxy.create({}, 666)
+  var p4 = Proxy.create({}, null)
   var o2 = Object.create(p3)
 
   assertSame(Object.getPrototypeOf(o1), Object.prototype)
   assertSame(Object.getPrototypeOf(p1), null)
   assertSame(Object.getPrototypeOf(p2), o1)
   assertSame(Object.getPrototypeOf(p3), p2)
   assertSame(Object.getPrototypeOf(p4), null)
   assertSame(Object.getPrototypeOf(o2), p3)
 
   assertTrue(Object.prototype.isPrototypeOf(o1))
@@ skipping 675 matching lines @@
 
 TestIsEnumerableThrow(Proxy.create({
   get: function(pr, pk) { throw "myexn" }
 }))
 
 TestIsEnumerableThrow(Proxy.create({
   get: function(pr, pk) {
     return function(k) { throw "myexn" }
   }
 }))