[promises] Move PromiseResolveThenableJob to c++

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 840a8bb2c4fb9204d1c3388506581cb144823cdb..23525c077c873d1b264953e057e36556e2432f4f 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -61,6 +61,13 @@ class Factory final {
   // Create a new boxed value.
   Handle<Box> NewBox(Handle<Object> value);
 
+  // Create a new PromiseContainer struct.
+  Handle<PromiseContainer> NewPromiseContainer(Handle<Object> promise,
+                                               Handle<Object> thenable,
+                                               Handle<JSFunction> then,
+                                               Handle<JSFunction> resolve,
+                                               Handle<JSFunction> reject);
+
   // Create a new PrototypeInfo struct.
   Handle<PrototypeInfo> NewPrototypeInfo();