http://web.airdroid.com/ http://web.airdroid.com/ maybe? Lots of drawbacks, though, and not 1:1 mirroring I believe, so may not fit your needs. But seems to sup

http://web.airdroid.com/ http://web.airdroid.com/ maybe? Lots of drawbacks, though, and not 1:1 mirroring I believe, so may not fit your needs. But seems to support whatsapp via screen mirroring + custom keyboard (probably?). Haven't tested since I'm currently on iOS.