[promises] Move PromiseReactionJob to c++

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 7c29880abcd96c315a3eb31dc362c2ad4f8860ac..296e61cb00a5fc73500fffd741dcdacc5e845055 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1109,6 +1109,9 @@ class Isolate {
   void ReportPromiseReject(Handle<JSObject> promise, Handle<Object> value,
                            v8::PromiseRejectEvent event);
 
+  void PromiseReactionJob(
+      Handle<PromiseReactionJobInfo> promise_reaction_job_info,
+      MaybeHandle<Object>* result, MaybeHandle<Object>* maybe_exception);
   void PromiseResolveThenableJob(Handle<PromiseContainer> container,
                                  MaybeHandle<Object>* result,
                                  MaybeHandle<Object>* maybe_exception);