[promises] Move PromiseReactionJob to c++

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 7c29880abcd96c315a3eb31dc362c2ad4f8860ac..8be69cb108fc9a9b198bbd5b22ee507ab309f7d9 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> info,
+                          MaybeHandle<Object>* result,
+                          MaybeHandle<Object>* maybe_exception);
   void PromiseResolveThenableJob(Handle<PromiseContainer> container,
                                  MaybeHandle<Object>* result,
                                  MaybeHandle<Object>* maybe_exception);