[promises] Move PromiseResolveThenableJob to c++

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 5c695dd4c90abfb617941b25ebf8d776e2927564..f4558567649b02e4ee1ebeb568a7b2fc2d627983 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<JSObject> promise, Handle<JSObject> 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();