I'm not sure if some of you understand what chrome actually is. You can't simply pin a hole in it, glue it or something similar to that. Also, properly chromed surface is pretty much resistant to many things, some heat, sunlight, moisture etc. included!
Also, once chrome cracks or starts peeling off, there is no other solution then to re-chrome. You can't permanently fix the spot to make chrome complete!
Chrome IS NOT a paint, or anything similar to paint!
You don't think something like this would work?
https://www.ehow.com/how_8636096_stop-chrome-flaking.html