That's one silly power fantasy.

But what if they really tried to do it? Well, the most likely outcome would be the US government declaring Google a risk to national security, and taking direct control. After all if this could happen to France, it could happen to the US, and governments of sovereign states really really hate non-state competitors that could potentially meddle with the operation of the state.

After that, whatever remains of Google would probably be auctioned off to cover the costs of the backlash (and probable legal action) from Google's corporate clients.