Add option to never suspend tabs with open PDF documents

[jdidion]

Recently I was working on a fill-in PDF form in the Chrome PDF viewer. The tab was suspended, and when I refreshed everything I had entered was gone. The easy solution is to not use the browser PDF viewer to fill in forms, but I'd still like to have this option in case I forget.

[deanoemcke]

Thanks for the feedback. You're not the only person requesting this: #435

There is a workaround for this which is to add "pdf" into your whitelist. You can use regular expressions also if you want to be more specific.

The ideal solution here would be to include editing of pdfs in the 'Never suspend tabs that contain unsaved input' option. I've actually just implemented this based on your idea. Thanks!

[jdidion]

Awesome, thanks!