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

test/mjsunit/argument-named-arguments.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 47 matching lines @@
   assertEquals("arguments", x);
   assertEquals(1, arguments.length);
   assertEquals("[object Arguments]", '' + arguments);
   var arguments = "foobar";
   assertEquals("arguments", x);
   assertEquals(6, arguments.length);
   assertEquals("foobar", '' + arguments);
 };
 
 h("arguments");