[promises] Move PromiseReactionJob to c++

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 3d73c334ab9133dbf3dc53cc9a78dfb4e1c7c24c..44e5368ba09dfebd6723ed377ac9e2d416aa7932 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -60,6 +60,12 @@ class Factory final {
   // Create a new boxed value.
   Handle<Box> NewBox(Handle<Object> value);
 
+  // Create a new PromiseHandleInfo struct.
+  Handle<PromiseHandleInfo> NewPromiseHandleInfo(
+      Handle<Object> value, Handle<Object> tasks, Handle<Object> deferreds,
+      Handle<Object> before_debug, Handle<Object> after_debug_event,
+      Handle<JSFunction> reaction_context);
+
   // Create a new PromiseContainer struct.
   Handle<PromiseContainer> NewPromiseContainer(
       Handle<JSReceiver> thenable, Handle<JSReceiver> then,