Follow jsc on not throwing when trying to add a property to a non-extensible object.

test/cctest/test-api.cc

 // Copyright 2007-2009 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 3852 matching lines @@
 
   ExpectBoolean("Object.isExtensible(undetectable)", true);
 
   source = v8_str("Object.preventExtensions(undetectable);");
   script = Script::Compile(source);
   script->Run();
   ExpectBoolean("Object.isExtensible(undetectable)", false);
 
   source = v8_str("undetectable.y = 2000;");
   script = Script::Compile(source);
-  v8::TryCatch try_catch;
   Local<Value> result = script->Run();
-  CHECK(result.IsEmpty());
-  CHECK(try_catch.HasCaught());
+  ExpectBoolean("undetectable.y == undefined", true);
 }
 
 
 
 THREADED_TEST(UndetectableString) {
   v8::HandleScope scope;
   LocalContext env;
 
   Local<String> obj = String::NewUndetectable("foo");
   env->Global()->Set(v8_str("undetectable"), obj);
@@ skipping 9588 matching lines @@
   v8::Handle<v8::Function> define_property =
       CompileRun("(function() {"
                  "  Object.defineProperty("
                  "    this,"
                  "    1,"
                  "    { configurable: true, enumerable: true, value: 3 });"
                  "})").As<Function>();
   context->DetachGlobal();
   define_property->Call(proxy, 0, NULL);
 }