Support setting named properties on non-JSObjects.

test/mjsunit/value-wrapper-accessor.js

 // Copyright 2014 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 59 matching lines @@
     }
     function strict(s) {
       return s.strict = 10;
     }
 
     nonstrict(object);
     nonstrict(object);
     %OptimizeFunctionOnNextCall(nonstrict);
     result = undefined;
     nonstrict(object);
-    // TODO(1475): Support storing to primitive values.
-    // This should return "object" once storing to primitive values is
-    // supported.
-    assertEquals("undefined", typeof result);
+    assertEquals("object", typeof result);
 
     strict(object);
     strict(object);
     %OptimizeFunctionOnNextCall(strict);
     result = undefined;
     strict(object);
-    // TODO(1475): Support storing to primitive values.
-    // This should return "object" once storing to primitive values is
-    // supported.
-    assertEquals("undefined", typeof result);
+    assertEquals(object, result);
   })();
 }
 
 test(1, Number.prototype);
 test("string", String.prototype);
 test(true, Boolean.prototype);