There's a 99% chance Chrysler will not cover this under warranty. However, check with your insurance company and see if they have a glass coverage program. Many do, such as Progressive and State Farm, and will replace your windshield at little or no cost to you. Furthermore, windshield claims don't count against your general insurance policy, so other than the small increase you pay for the coverage itself (mine cost an additional $3/mo), your insurance will not go up when you replace your windshield. Given the shape of the Jeep and angle of the windshield, it's a nice thing to have, but I live in an area where sand and rocks are on roads and streets often during the Winter and Spring months.
I still wonder if the 2011+ windshields are made differently (other than the Jeep easter eggs) than the previous JK models. Both my TJ and my last JK ('07) took more rocks to the face than Whitney Houston and other than knicks and pits, they never cracked. On my '12, I've gone through two windshields already (and they only cost me $50) and it looks like a third one is in the near future.
'14 Wrangler Unlimited Rubicon