Which child actor appeared as the son of an alcoholic, ex-heavyweight boxer in the 1931 film, "The Champ"?

In the 1931 film, The Champ, the main character (Wallace Beery) is a down-on-his-luck boxer in Tijuana whose son, Dink (Jackie Cooper), adores him. He loves his father despite "Champs" addictions to alcohol and gambling. Jackie Cooper as Dink displayed the extreme (absolute) kind of loyalty a little boy can have for his father under any and all circumstances.

When Champ wins enough money from a bet to buy Dink a horse, they enter it into a race, where they encounter Linda (Irene Rich), Dinks mother. Dink had never met her. Her name is Linda (Irene Rich). Linda's rich new husband, Tony (Hale Hamilton), convinces Champ to let Dink come and stay with them. Nevertheless, Dink's love for his father wins out and brings him back to Tijuana.