Verbose Boot after crashed program on Macbook Pro
This is a known issue with Snow Leopard and Google Drive. I've seen this many times before and deleting Google Drive completely from the Macbook usually fixes it without issue. When you reinstalled Snow Leopard did you do a clean install or was it truly just a reinstall. If you really got rid of Google Drive and it's not booting sounds like something may have happened to the hard drive. I would try a clean restore of Snow Leopard before taking any hardware action. :)