[undetectable] Really get comparisons of document.all right now.

test/mjsunit/undetectable-compare.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
 
 var undetectable = %GetUndetectable();
 
 var tests = [
   true,        false,
@@ skipping 74 matching lines @@
   assertTrue(undetectable == undetectable);
   assertTrue(undetectable === undetectable);
 
 }
 
 for (var i = 0; i < 5; i++) {
   test();
 }
 
 
-assertTrue(undetectable == %GetUndetectable());
+assertFalse(undetectable == %GetUndetectable());
 assertFalse(undetectable === %GetUndetectable());
 
 
 function test2(a, b) {
-  assertTrue(a == b);
+  return a == b;
 }
-test2(1, 1);
-test2(undetectable, undetectable);
+test2(0, 1);
+test2(undetectable, {});
+%OptimizeFunctionOnNextCall(test2);
 for (var i = 0; i < 5; ++i) {
-  test2(undetectable, %GetUndetectable());
+  assertFalse(test2(undetectable, %GetUndetectable()));
 }