Add GetPropertyAttribute method for Object in the API

src/handles.cc

 // Copyright 2011 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 372 matching lines @@
 }
 
 
 Handle<Object> GetElement(Handle<Object> obj,
                           uint32_t index) {
   Isolate* isolate = Isolate::Current();
   CALL_HEAP_FUNCTION(isolate, Runtime::GetElement(obj, index), Object);
 }
 
 
+PropertyAttributes GetPropertyAttribute(Handle<JSObject> obj,
+                                        Handle<Object> key,
+                                        bool* has_pending_exception) {
+  return obj->TryGetPropertyAttribute(key, has_pending_exception);
+}
+
+
 Handle<Object> GetPropertyWithInterceptor(Handle<JSObject> receiver,
                                           Handle<JSObject> holder,
                                           Handle<String> name,
                                           PropertyAttributes* attributes) {
   Isolate* isolate = receiver->GetIsolate();
   CALL_HEAP_FUNCTION(isolate,
                      holder->GetPropertyWithInterceptor(*receiver,
                                                         *name,
                                                         attributes),
                      Object);
@@ skipping 563 matching lines @@
 
 bool CompileOptimized(Handle<JSFunction> function,
                       int osr_ast_id,
                       ClearExceptionFlag flag) {
   CompilationInfo info(function);
   info.SetOptimizing(osr_ast_id);
   return CompileLazyHelper(&info, flag);
 }
 
 } }  // namespace v8::internal