Merge bleeding edge up to 8774 into the GC branch.

test/mjsunit/regress/regress-1563.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 24 matching lines @@
   obj[0] = arg;
 }
 
 set_pixel(obj, 1.5);
 set_pixel(obj, NaN);
 %OptimizeFunctionOnNextCall(set_pixel);
 set_pixel(obj, undefined);
 set_pixel(obj, undefined);
 
 assertEquals(0, obj[0]);