The large container of Tone's chicken spice mixture next to the Coke is detailed here. The other spices are 1 teaspoon each of oregano and thyme, 4 crumbled bay leaves, a hefty squirt of Worcestershire sauce and a half cup of sugar.

After heavily dousing the chicken parts with the Tone's chicken spice mixture, Adriana browns the chicken, and then adds

 the other spices and sugar

then 2 cups of tomato purée

and 1 cup of Coke.

She stirs the sauce well and then covers the pan to simmer for about 40 minutes.

Although the name of this dish is sweet and sour, it was more sweet than sour.  But very tasty.