It is normal, because the customized user profiles settings and personal data will be removed after sysprep generalize.
If you want to keep Google Chrome Bookmark, maybe you could Export the bookmarks to an HTML file and keep it in your customized image, once deployment complete, import it manually or via a startup script.
Another method, use an answer file containing the CopyProfile parameter, which is designed to copy the user's profile to the default user profile during the Sysprep
https://technet.microsoft.com/en-us/library/hh825135.aspx
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