Since you mention Google, my understanding is that you still go through the standard hiring process
If they buy the company that you built specifically to get access to you, do you think you'll still end up getting screened out by some junior dev on a whiteboard? All policies have exceptions. Your goal is to be exceptional.
In this case probably not, but you'll have to do several rounds with the VPs. Of course the tenor is very different, more conversational / situtational instead of technical questions. But you're still being sniffed out. Unless you're already pals with the VP.