It's late but I'm confused why anyone would spend time doing this, and since it is in the official Google repository, presumably someone at Google was actually doing it on paid time.
> since it is in the official Google repository, presumably someone at Google was actually doing it on paid time
Unlikely. Google (like many companies) assert ownership of everything their employees create, even on their free time. There are plenty of projects under Google organization that have no other affiliation with Google.
I had this question all the time. I agree, they should do something like google20p, which would have the side effect of advertising the fact that 20 percent still exists.
https://flagxor.com/article/source-code
I might be coming around to the why of this.