To prepare salad, sprinkle chicken with 1/8 teaspoon salt. Heat 1 teaspoon oil in a nonstick skillet over medium-high heat. Add chicken; cook 2 minutes on each side or until browned. Add 1 cup broth; cover, reduce heat, and simmer 10 minutes or until done. Cool; shred chicken. Discard broth.
Bring 3 cups broth to a boil in a large saucepan; add barley. Cover, reduce heat, and simmer 35 minutes or until liquid is absorbed. Fluff with a fork. Cool. Combine chicken, barley, cucumber, and next 4 ingredients (through olives) in a large bowl.
To prepare dressing, combine 3 tablespoons oil, rind, and remaining ingredients; stir well. Add to barley mixture; toss well. Cover and chill.