Read this answer in context If not, sync will only sync data that is connected to the account and cannot be a reliable back up.
Hi bujanover, I understand that sync is not restoring bookmarks, I am happy to help.
I am sure you will still have the bookmarks on the mobile merge.
Chatting with the sync guys to double check, hold tight. You are absolutely correct in your caution around changing your password then adding a mobile device with bookmarks that have no back up.
I have been through all the tips offered on this site (unlinking, updating, re-linking...), with limited success : the history of the various devices in synchronized, but NOT the bookmarks. Settings Import bookmarks from android (hardly any bookmarks imported) .