1. Rinse chicken, and pat dry. Combine flour, salt, and pepper in a large zip-top plastic freezer bag. Place chicken pieces in bag; seal bag, and shake to coat. Remove chicken.
2. Heat olive oil in a large skillet over medium-high heat until hot; add chicken. Cook 3 minutes on each side or until lightly browned. Place chicken in a greased 5-qt. oval-shaped slow cooker, reserving drippings in skillet.
3. Cook mushrooms and onion in hot drippings 5 minutes or until tender. Add mushroom mixture, broth, capers, and artichokes to slow cooker. Cover and cook on Low 4 hours or until chicken is tender.