Cut chicken into 2-inch chunks and add to the slow cooker.
Combine onion, green chilies, garlic, tomatoes, chicken broth, vegetable juice cocktail, cumin, chili powder, salt, pepper and Worcestershire sauce in a bowl. Stir to combine. Pour over chicken in slow cooker.
Cook on low for 4 hours or high for 2 hours.
Drain corn and black beans and add to slow cooker. Cook on low for one hour.
Cut flour tortillas on a cookie sheet and bake in a 350-degree oven 10 minutes until browned and crisp.
Serve soup hot with tortillas, cheese, yogurt or sour cream and fresh cilantro.