They're calling the new product "Doritos Rock'n White Corn Cream Stew"-flavored chips and they're set to release on November 17, 2014 and will only be sold for a limited time as a winter flavor. The white corn cream stew-flavored powder is white so that it looks like the "trees" have snow on them.
Frito-Lay has actually done Christmas tree-shaped Doritos in the country before, but this appears to be the first time that they're actually green.