SevenCubed - 7:04 pm on Feb 10, 2013 (gmt 0)
I've been aware of WebP for almost 2 years now when it first reared it's head. I think if anything like that was going to happen it would have by now.
Besides that, google might have more to loose within the internet development community than they would have to gain from chrome adoption.
By now I'm sure they are well aware of the growing momentum of anti-google sentiment. I don't think they would consider throwing more fuel on the fire.