Implement LookupIterator designed to replace LookupResult

src/json-stringifier.h

Index: src/json-stringifier.h
diff --git a/src/json-stringifier.h b/src/json-stringifier.h
index 23927b162edc09514d3cadb77efa3a604ed5fb32..03461d723532a4b1c6d3d9438a6695498ad1ea83 100644
--- a/src/json-stringifier.h
+++ b/src/json-stringifier.h
@@ -338,15 +338,9 @@ void BasicJsonStringifier::Append_(const Char* chars) {
 
 MaybeHandle<Object> BasicJsonStringifier::ApplyToJsonFunction(
     Handle<Object> object, Handle<Object> key) {
-  LookupResult lookup(isolate_);
-  JSObject::cast(*object)->LookupRealNamedProperty(tojson_string_, &lookup);
-  if (!lookup.IsProperty()) return object;
-  PropertyAttributes attr;
+  LookupIterator it(object, tojson_string_, LookupIterator::SKIP_INTERCEPTOR);
   Handle<Object> fun;
-  ASSIGN_RETURN_ON_EXCEPTION(
-      isolate_, fun,
-      Object::GetProperty(object, object, &lookup, tojson_string_, &attr),
-      Object);
+  ASSIGN_RETURN_ON_EXCEPTION(isolate_, fun, Object::GetProperty(&it), Object);
   if (!fun->IsJSFunction()) return object;
 
   // Call toJSON function.