Move all Harmony-only tests to harmony/

test/mjsunit/harmony/regress/regress-2829.js

 // Copyright 2013 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 33 matching lines @@
   var o1 = {};
   wm1.set(o1, 23);
   assertTrue(wm1.has(o1));
   Object.freeze(o1);
 
   var wm2 = new WeakMap();
   var o2 = Object.create(o1);
   wm2.set(o2, 42);
   assertEquals(42, wm2.get(o2));
 })();