Working at that type of relative intensity I would recommend doing at least
something to get ready for the lifts.
If this was a light weight bodybuilding thing I'd say different.
Yes the body is good and warmed up but you also have a lot of blood pooling in the legs and things like that. Habitually jumping into a relatvely heavy bench or something like that is a prescription for shoulder and other problems. You may not need anywhere near the warmup you used for squats but at least give the joints a little attention and acclimation. And heavier, in terms of intensity, the weight to be used is the more warmup should be used.
And please nobody say the follwing: "I've been doing that for years with no problem."
I hear that one more time and I'm going to have to lay on some nasty smileys
Generally I'd recommend doing the bench before rows. And even though you want to work on the rows I don't think it's a good idea to do it that way. I am talking about this specific case and not saying "never do any rowing before benching". The problem is that you are creating fatigue in some very important stabilizer muscles that you need during your bench. Not only will it take away from the bench but will make it harder for your shoulders to stabilize. Like I said, this is work of a fairly heavy nature.