1.1.1.0/24 [0] is described as "Research prefix for APNIC Labs", but it is part of AS15169 [1] which is "Google Inc."
Also part of that AS are 1.0.0.0/24 [2] and 1.2.3.0/24 "APNIC Debogon Project" [3]. Wikipedia has some information about Bogon filtering [4] and there have been some publications about the Debogon Project [5].
The now assigned addresses used to be unassigned "bogon" addresses, which are now assigned. I'm not sure why it's part of the Google AS, though. Maybe only because they get to see a lot of traffic?