I read he did Center drills at the combine and excelled at it. I do think he is a plug and play C but he can also play G and T as he has the size, athleticism and strength, added bonus: he can pull like the best of them
Still, if by the 3rd round Van Pran or Frazier are available you can always double dip and move Barton to RT if the other drafted Center proves to be starting material right away too. You went from zero depth to 2 capable starters, though I think Van Pran, at age 22, can't handle the starting spot yet. That's why Barton can begin there and then move when VP is ready