Add v8::Object::GetRealNamedPropertyAttributes()

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index fa32ba3cdfb3cf77c803da527e480832230c591b..3229da106a4db4a1df5bd85c6fcea3bae0aef20a 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2617,12 +2617,27 @@ class V8_EXPORT Object : public Value {
   Local<Value> GetRealNamedPropertyInPrototypeChain(Handle<String> key);
 
   /**
+   * Gets the property attributes of a real property in the prototype chain,
+   * which can be None or any combination of ReadOnly, DontEnum and DontDelete.
+   * Interceptors in the prototype chain are not called.
+   */
+  Maybe<PropertyAttribute> GetRealNamedPropertyAttributesInPrototypeChain(
+      Handle<String> key);
+
+  /**
    * If result.IsEmpty() no real property was located on the object or
    * in the prototype chain.
    * This means interceptors in the prototype chain are not called.
    */
   Local<Value> GetRealNamedProperty(Handle<String> key);
 
+  /**
+   * Gets the property attributes of a real property which can be
+   * None or any combination of ReadOnly, DontEnum and DontDelete.
+   * Interceptors in the prototype chain are not called.
+   */
+  Maybe<PropertyAttribute> GetRealNamedPropertyAttributes(Handle<String> key);
+
   /** Tests for a named lookup interceptor.*/
   bool HasNamedLookupInterceptor();