Migrate Object.definePropert{ies,y} from v8natives to builtins.

src/js/v8natives.js

Index: src/js/v8natives.js
diff --git a/src/js/v8natives.js b/src/js/v8natives.js
index 3acfa2b69026f19d9ba8d5c697624d54ae8c8030..dc3c43b8eca5440adf97670f7cf68561c441710b 100644
--- a/src/js/v8natives.js
+++ b/src/js/v8natives.js
@@ -737,22 +737,6 @@ function ObjectSetPrototypeOf(obj, proto) {
 }
 
 
-// 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.
-  return %ObjectDefineProperty(obj, p, attributes);
-}
-
-
-// ES5 section 15.2.3.7.
-function ObjectDefineProperties(obj, properties) {
-  // The new pure-C++ implementation doesn't support O.o.
-  // TODO(jkummerow): Implement missing features and remove fallback path.
-  return %ObjectDefineProperties(obj, properties);
-}
-
-
 // ES6 B.2.2.1.1
 function ObjectGetProto() {
   return %object_get_prototype_of(this);
@@ -805,8 +789,6 @@ utils.InstallGetterSetter(GlobalObject.prototype, "__proto__", ObjectGetProto,
 
 // Set up non-enumerable functions in the Object object.
 utils.InstallFunctions(GlobalObject, DONT_ENUM, [
-  "defineProperty", ObjectDefineProperty,
-  "defineProperties", ObjectDefineProperties,
   "setPrototypeOf", ObjectSetPrototypeOf,
   // getOwnPropertySymbols is added in symbol.js.
   // Others are added in bootstrapper.cc.
@@ -1044,8 +1026,6 @@ utils.Export(function(to) {
   to.IsNaN = GlobalIsNaN;
   to.NumberIsNaN = NumberIsNaN;
   to.NumberIsInteger = NumberIsInteger;
-  to.ObjectDefineProperties = ObjectDefineProperties;
-  to.ObjectDefineProperty = ObjectDefineProperty;
   to.ObjectHasOwnProperty = GlobalObject.prototype.hasOwnProperty;
 });