By Scarlett O’Toole Travis Barker has added to his growing tattoo collection as he went out to get a new ink dedicated to his baby son Rocky. The Blink-182 drummer, 48, gave fans a glimpse of his new addition as he shared a picture from his trip to the tattoo parlour on Snapchat. The picture showed black ink and tattoo needles on top of a table, as well as a stencil for his latest piece of art. The small stencil simply had the word ‘Rocky’ written on it, in honour of Travis’ baby boy. Rocky, who Travis shares with his wife Kourtney Kardashian, was born back in November and the family has been …