HEAT barbecue to medium heat.
COMBINE first 4 ingredients in large bowl. Mix dressing, lime juice and chili powder. Add to chicken mixture; toss to coat.
SPOON down centres of tortillas. Fold in opposite sides of each tortilla, then roll up burrito-style.
GRILL, seam-sides down, 8 to 9 min. or until golden brown, turning occasionally. Serve topped with salsa and sour cream.
serving size = 1 wrap (217 g)