I'm pretty sure that someone deep within Google is running the numbers that if they were to do this on Android what would be the hit to Google and the hit to FB

I'm pretty sure that someone deep within Google is running the numbers that if they were to do this on Android what would be the hit to Google and the hit to FB and if it is worth to take that hit if it hurts their competitor, FB, more. I would be very surprised if Google is not looking into to. Google has other avenues to collect data and deep tentacles so the hit to them may not be much, but FB might be hurt more. And, on the flip side, it may also buy Google some privacy goodwill.