I don't have a problem with it. Yes, he would have beaten Brown to the ball but if he'd slipped you wouldn't stop playing would you? You wouldn't say, ah well, that's not fair, he slipped. You'd take advantage of it.
Brown did the right thing. 100% Plus the ref allowed play to continue.
And I'd say the same if it was the other way around. Even if I was a bit pissed off, I'd agree the player did the rigt thing.