Merge r5509, r5512, r5530 to 2.3 branch ...

test/mjsunit/regress/regress-874.js

 // Copyright 2010 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 17 matching lines @@
 var x = { };
 
 var getter = function(){ return 42; };
 var setter = function(value){ };
 x.__defineGetter__(0, getter);
 x.__defineSetter__(0, setter);
 
 assertEquals (undefined, Object.getOwnPropertyDescriptor(x, 0).value);
 assertEquals (getter, Object.getOwnPropertyDescriptor(x, 0).get);
 assertEquals (setter, Object.getOwnPropertyDescriptor(x, 0).set);