Added ES5 15.2.3.2 Object.getPrototypeOf.

src/v8natives.js

 // Copyright 2006-2008 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 431 matching lines @@
     %SetProperty(obj, p, desc.getValue(), flag);
   } else {
     if (IS_FUNCTION(desc.getGet())) %DefineAccessor(obj, p, GETTER, desc.getGet(), flag);
     if (IS_FUNCTION(desc.getSet())) %DefineAccessor(obj, p, SETTER, desc.getSet(), flag);
   }
   return true;
 }
 
 
 // ES5 section 15.2.3.5.
+function ObjectGetPrototypeOf(obj) {
+  if (!(IS_OBJECT(obj) || IS_FUNCTION(obj))) {
+    throw MakeTypeError("object_get_prototype_non_object", [obj]);
+  }
+  return obj.__proto__;
+}
+
+
+// ES5 section 15.2.3.5.
 function ObjectCreate(proto, properties) {
   if (!IS_OBJECT(proto) && !IS_NULL(proto)) {
     throw MakeTypeError("proto_object_or_null", [proto]);
   }
   var obj = new $Object();
   obj.__proto__ = proto;
   if (!IS_UNDEFINED(properties)) ObjectDefineProperties(obj, properties);
   return obj;
 }
 
@@ skipping 43 matching lines @@
     "hasOwnProperty", ObjectHasOwnProperty,
     "isPrototypeOf", ObjectIsPrototypeOf,
     "propertyIsEnumerable", ObjectPropertyIsEnumerable,
     "__defineGetter__", ObjectDefineGetter,
     "__lookupGetter__", ObjectLookupGetter,
     "__defineSetter__", ObjectDefineSetter,
     "__lookupSetter__", ObjectLookupSetter
   ));
   InstallFunctions($Object, DONT_ENUM, $Array(
     "keys", ObjectKeys,
-    "create", ObjectCreate
+    "create", ObjectCreate,
+    "getPrototypeOf", ObjectGetPrototypeOf
   ));
 }
 
 SetupObject();
 
 
 // ----------------------------------------------------------------------------
 // Boolean
 
 function BooleanToString() {
@@ skipping 247 matching lines @@
 
 // ----------------------------------------------------------------------------
 
 function SetupFunction() {
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "toString", FunctionToString
   ));
 }
 
 SetupFunction();