Added constructor call on object in InstantiateObject method

src/api-natives.cc

Index: src/api-natives.cc
diff --git a/src/api-natives.cc b/src/api-natives.cc
index c95f2ce2553210a33374c1fee23282096b05b862..978c21114e10b3495d5d1461d3c1fd4e1b7af03b 100644
--- a/src/api-natives.cc
+++ b/src/api-natives.cc
@@ -205,6 +205,10 @@ MaybeHandle<JSObject> InstantiateObject(Isolate* isolate,
   auto object = isolate->factory()->NewJSObject(cons);
   ASSIGN_RETURN_ON_EXCEPTION(
       isolate, result, ConfigureInstance(isolate, object, info), JSFunction);
+  if (!constructor->IsUndefined()) {
+    RETURN_ON_EXCEPTION(
+        isolate, Execution::Call(isolate, cons, result, 0, nullptr), JSObject);
+  }
   // TODO(dcarney): is this necessary?
   JSObject::MigrateSlowToFast(result, 0, "ApiNatives::InstantiateObject");
   return scope.CloseAndEscape(result);