[builtins] Migrate Object.getOwnPropertyDescriptor to C++.

src/js/v8natives.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 // ----------------------------------------------------------------------------
 // Imports
@@ skipping 754 matching lines @@
   }
 
   if (IS_RECEIVER(obj)) {
     %SetPrototype(obj, proto);
   }
 
   return obj;
 }
 
 
-// ES6 section 19.1.2.6
-function ObjectGetOwnPropertyDescriptor(obj, p) {
-  return %GetOwnProperty(obj, p);
-}
-
-
 // ES5 section 15.2.3.6.
 function ObjectDefineProperty(obj, p, attributes) {
   // The new pure-C++ implementation doesn't support O.o.
   // TODO(jkummerow): Implement missing features and remove fallback path.
   if (%IsObserved(obj)) {
     if (!IS_RECEIVER(obj)) {
       throw MakeTypeError(kCalledOnNonObject, "Object.defineProperty");
     }
     var name = TO_NAME(p);
     var desc = ToPropertyDescriptor(attributes);
@@ skipping 79 matching lines @@
                     ObjectSetProto);
 
 // Set up non-enumerable functions in the Object object.
 utils.InstallFunctions(GlobalObject, DONT_ENUM, [
   // assign is added in bootstrapper.cc.
   // keys is added in bootstrapper.cc.
   "defineProperty", ObjectDefineProperty,
   "defineProperties", ObjectDefineProperties,
   "getPrototypeOf", ObjectGetPrototypeOf,
   "setPrototypeOf", ObjectSetPrototypeOf,
-  "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor,
   // getOwnPropertySymbols is added in symbol.js.
   "is", SameValue,  // ECMA-262, Edition 6, section 19.1.2.10
   // deliverChangeRecords, getNotifier, observe and unobserve are added
   // in object-observe.js.
 ]);
 
 
 // ----------------------------------------------------------------------------
 // Boolean
 
@@ skipping 277 matching lines @@
   to.ObjectDefineProperties = ObjectDefineProperties;
   to.ObjectDefineProperty = ObjectDefineProperty;
   to.ObjectHasOwnProperty = ObjectHasOwnProperty;
 });
 
 %InstallToContext([
   "object_value_of", ObjectValueOf,
 ]);
 
 })