That said, I'm sure you could argue over who gets to claim WebKit as their own these days since I've seen a few people refer to it as "Google's WebKit" since they surpassed Apple in checkins at some point (or had for a month at least, it's not something I care to follow that closely).
The fact that Google does more work on it would tend to weaken the point. Also, the fact that Google is using Apple's software tends to undermine the Team A vs Team B regime that's the premise of most of these discussions.
That would be my point. Practically all post-2007 phones and tablets depend on Apple's open-source work. It's easily the most important application on mobile devices. Had Apple decided to roll their own proprietary browser instead of extending an open-source project, they would have a far bigger lead over the competition. And they did it without a lot of crowing about how moral it made them.
