Merge up to 8597 to experimental/gc from the bleeding edge.

test/mjsunit/regress/regress-1360.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 19 matching lines @@
 
 var global = this;
 function strict() { "use strict"; assertEquals(void 0, this); }
 function non_strict() { assertEquals(global, this); }
 
 [1,2,3].sort(strict);
 [1,2,3].sort(non_strict);
 
 "axc".replace("x", strict);
 "axc".replace("x", non_strict);