Disable ES6 tail call elimination for native functions.

test/mjsunit/function-caller.js

 // Copyright 2008 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 29 matching lines @@
 }
 h();
 
 // Check called from top-level.
 f(null);
 
 // Check called from eval.
 eval('f(null)');
 
 // Check called from strict builtin functions.
-// [null, null].sort(f);  // Does not work because sort tail calls.
+[null, null].sort(f);
 [null].forEach(f, null);
 
 // Check called from sloppy builtin functions.
 "abel".replace(/b/g, function h() {
    assertEquals(String.prototype.replace, h.caller);
 });