Chams are so hard to care for because they need the oddest combo: i.e. high humidity and almost total ventilation. So, full glass enclosures actually aren't very good for them. The way humidity is kept up, most often, is the use of lots of nice safe live plants, and constant misting.

That said, that cage COULD potentially work as a cham cage...but you'd want to wrap the whole thing in screening. Chams are insectivores, and not all of them will cup feed (i.e. eat from a food dish) so insects would be getting out left and right without screening.
Also, if you're thinking of owning a cham, whatever cage you use, do a LOT of research and be SURE that the room/area you would put them in can maintain the proper temps! I got a cham not long ago, after building a great cage, doing all the research, and getting a ton of stuff...and I couldn't keep him because my apartment wouldn't hold the right temperatures without the AC or Heater being on all the time. They are a high maintenance and experience animal.

At any rate, I had one of those cages once, and I used mine for my rats. They adored it.