[promises] Move PromiseResolveThenableJob to c++

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index fc7870496e3ef2fcf590b39a80b78bbeb4cbde53..d9127f82221470812a22330f2d1bbcc744f990e5 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 PromiseContainer struct.
+  Handle<PromiseContainer> NewPromiseContainer(
+      Handle<JSReceiver> thenable, Handle<JSFunction> then,
+      Handle<JSFunction> resolve, Handle<JSFunction> reject,
+      Handle<Object> before_debug_event, Handle<Object> after_debug_event);
+
   // Create a new PrototypeInfo struct.
   Handle<PrototypeInfo> NewPrototypeInfo();