It depends on if you're talking v4 or v5. OneGet isn't in v4, obviously, and v5 is extremely beta still. OneGet, by definition, is not mature yet.
Microsoft doesn't have a Chocolatey resource, so you'd either have to get one from the community (they exist) or build your own. Alternately, if your logic is simple enough, you could build a Script resource that runs a Chocolatey command.