[runtime] Migrate Object.create 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 775 matching lines @@
 }
 
 
 // ES5 section 15.2.3.4.
 function ObjectGetOwnPropertyNames(obj) {
   obj = TO_OBJECT(obj);
   return %GetOwnPropertyKeys(obj, PROPERTY_FILTER_SKIP_SYMBOLS);
 }
 
 
-// ES5 section 15.2.3.5.
-function ObjectCreate(proto, properties) {
-  if (!IS_RECEIVER(proto) && proto !== null) {
-    throw MakeTypeError(kProtoObjectOrNull, proto);
-  }
-  var obj = {};
-  %InternalSetPrototype(obj, proto);
-  if (!IS_UNDEFINED(properties)) ObjectDefineProperties(obj, properties);
-  return obj;
-}
-
-
 // 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 122 matching lines @@
   "__defineSetter__", ObjectDefineSetter,
   "__lookupSetter__", ObjectLookupSetter
 ]);
 utils.InstallGetterSetter(GlobalObject.prototype, "__proto__", ObjectGetProto,
                     ObjectSetProto);
 
 // Set up non-enumerable functions in the Object object.
 utils.InstallFunctions(GlobalObject, DONT_ENUM, [
   // assign is added in bootstrapper.cc.
   "keys", ObjectKeys,
-  "create", ObjectCreate,
   "defineProperty", ObjectDefineProperty,
   "defineProperties", ObjectDefineProperties,
   "freeze", ObjectFreezeJS,
   "getPrototypeOf", ObjectGetPrototypeOf,
   "setPrototypeOf", ObjectSetPrototypeOf,
   "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor,
   "getOwnPropertyNames", ObjectGetOwnPropertyNames,
   // getOwnPropertySymbols is added in symbol.js.
   "is", SameValue,  // ECMA-262, Edition 6, section 19.1.2.10
   "isExtensible", ObjectIsExtensible,
@@ skipping 314 matching lines @@
   to.ObjectIsFrozen = ObjectIsFrozen;
   to.ObjectIsSealed = ObjectIsSealed;
   to.ObjectKeys = ObjectKeys;
 });
 
 %InstallToContext([
   "object_value_of", ObjectValueOf,
 ]);
 
 })