Google phases out referrals program the week before Chrome

Is it a coincidence that Google phased out it’s paid referrals program for Firefox, effective at the end of August, and introduces its own browser on September 2nd?

I was playing around in the adsense management area today and saw that the referrals area was still there. Even though there was a message that stated that it was being phased out and that the phase out date had already passed. I’m curious if the real phase out was just of Firefox and that the system will now be used to push Chrome.