Yo,
Note that if the chip is in an area roughly 10" x 10" directly in front of the driver's line of sight, 99% of glass repair shops will not fix it. This is due to inumerable lawsuits that have occurred where drivers got in accidents later and blamed the glass repair shops, stating that the repair work left a mark on the windshield which distracted them while driving.
If this is the case, the glass repair shops will tell you they won't work on the chip and tell you to replace the windshield.
-PCM