Earlier quoted context omitted.
The hashes of all things that match a "probably evil" bloom filter, yes. Hosting a virus on a domain and then downloading it a few times with different chrome installations sounds like a good way to get the whole domain blacklisted...
That's why user uploads are worth some thought and consideration. File uploads normally gets treated as a nuisance by developers because it can become kind of fiddly even when it works and you are getting file upload bugs from support. It normally isn't that much of a challenge to mitigate the issues, but other things get priorities. Companies end up leaving pivots to XSS attacks and similar bugs too.
I'm actually not telling the truth but at what point did you realize that? And what would be the implications if Google actually did release a service like this? It feels a bit like racketeering.