[promises] Set promise context's closure to be an empty function

src/promise-utils.cc

Index: src/promise-utils.cc
diff --git a/src/promise-utils.cc b/src/promise-utils.cc
index fa5213463b6f4709f181578797af279ba6702d73..607dbe8caa38f658c5edf5b12557bf39e1be325d 100644
--- a/src/promise-utils.cc
+++ b/src/promise-utils.cc
@@ -44,6 +44,8 @@ void PromiseUtils::CreateResolvingFunctions(Isolate* isolate,
       isolate->factory()->NewPromiseResolvingFunctionContext(
           kPromiseContextLength);
   context->set_native_context(*isolate->native_context());
+  // We set the closure to be an empty function, same as native context.
+  context->set_closure(isolate->native_context()->closure());
   context->set(kAlreadyVisitedSlot, Smi::kZero);
   context->set(kPromiseSlot, *promise);
   context->set(kDebugEventSlot, *debug_event);