I don't think you can do that... Maybe black has a plan, and as a tournament director you have to give black that opportunity.
In this particular example, I don't really see why black isn't resigning... Maybe he wants to enjoy his highest rating for a few days.
If Black is on vacation, you get a whole other story... But that isn't the case here.
This is not about resignation.
The site will adjudicate a tournament game where the losing player is on vacation. The policy stated here in post#4 http://www.chess.com/forum/view/community/vacation-cheating.
"if someone is delaying a tournament game in a losing position, simply contact staff and it will be adjudicated."
This could be viewed as including non-resigners but then this is not about resignation.
What about this game? http://www.chess.com/echess/game.html?id=15671130
With only this game left in the round, White is currently on vacation after Black's 46th move. If someone in the tournament complained, would you award the win to White?