Johnny Depp was spotted with a birthday cake during his “Black Mass” shoot on Monday. The actor turned 51 on June 9. Also on set on Monday was actress Dakota Johnson (pictured), who plays Whitey Bulger’s longtime former girlfriend Lindsey Cyr in the “Black Mass” adaptation. She was here over the weekend and was seen dining at Ken Oringer’s Back Bay eatery Uni Sashimi Bar. Johnson, 24, who also stars as Anastasia Steele in the upcoming film adaptation of “Fifty Shades of Grey,” is the daughter of Don Johnson and Melanie Griffith (and granddaughter of Tippi Hedren).