https://github.com/google/schism
For some reason, Google was working on a Scheme WASM compiler, which they got self-hosting. It was then abandoned. I don't really know what they were trying to accomplish with that project.
This was a personal project of a then-Googler, not a Google project.
https://github.com/schism-lang/schism
Previous discussion with comments by the author, https://news.ycombinator.com/item?id=16488605