Remove the optimized construct stub.

test/mjsunit/object-define-property.js

 // Copyright 2012 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 1177 matching lines @@
   o.blubb = 123;
 }
 
 function C() {}
 
 Assign(new C);
 Assign(new C);
 %OptimizeFunctionOnNextCall(Assign);
 Object.defineProperty(C.prototype, "blubb", {get: function() { return -42; }});
 Assign(new C);
+
+// Test that changes to the prototype of a simple constructor are not ignored,
+// even after creating initial instances.
+function C() {
+  this.x = 23;
+}
+assertEquals(23, new C().x);
+C.prototype.__defineSetter__('x', function(value) { this.y = 23; });
+assertEquals(void 0, new C().x);