This is generally because ChromeOS isn't just an OS based on Chrome - Chrome itself is the OS, supported by how the OS portion is just a folder in the chromium/

This is generally because ChromeOS isn't just an OS based on Chrome - Chrome itself is the OS, supported by how the OS portion is just a folder in the chromium/src tree[0]. Edit: looks like there's now an effort to separate them, as the readme says. see [1]. 0: https://chromium.googlesource.com/chromium/src/+/refs/heads/main/chromeos/ https://chromium.googlesource.com/chromium/src/+/refs/heads/... 1: https://chromium.googlesource.com/chromium/src.git/+/refs/heads/main/docs/lacros.md https://chromium.googlesource.com/chromium/src.git/+/refs/he...