Use Content Aware Fill for extending transparent object boundaries

I’m posting this tutorial and Photoshop CS5 action in response to this thread, where someone needed a good method for extending pixel edges of things like foliage for game art. This works also well for creating UV cleanup borders. Perform this script on a duplicate of your layer and put it below your existing one. It alters a 1px radius at the edge while extending, so you might not want that on your original layer. Grab the Photoshop CS5 action I made here.