Google has been working on a dual-screen Chrome device codenamed Palika. The reveal comes from developers talking about it as a dual touchscreen device and commenting on the code to support it.
The information has been unearthed by 9to5Google, and it seems that this device has a touch controller on the lid and the base - so it sounds like it's adopting the format we've seen recently from devices like the Asus ZenBook Pro Duo where there's a second display above the keyboard.