libbrillo: Migrate NOTREACHED_IN_MIGRATION to NOTREACHED BUG=b:379735176 TEST=CQ Change-Id: I1488cc277e9fbe4e4f2277216e7133a37616cdff Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/7727323 Tested-by: Brett Brotherton <bbrotherton@google.com> Reviewed-by: Sarthak Kukreti <sarthakkukreti@google.com> Commit-Queue: Brett Brotherton <bbrotherton@google.com> Auto-Submit: Brett Brotherton <bbrotherton@google.com> NOKEYCHECK=True GitOrigin-RevId: 5813947e09552c381216610f2b90c0499511b2c0
libbrillo is a shared library meant to hold common utility code that we deem useful for platform projects. It supplements the functionality provided by libbase/libchrome since that project, by design, only holds functionality that Chromium (the browser) needs. As a result, this tends to be more OS-centric code.
This project is also used by Update Engine which is maintained in AOSP. However, AOSP doesn't use this codebase directly, it maintains its own libbrillo fork.
To help keep the projects in sync, we have a gsubtree set up on our GoB: https://chromium.googlesource.com/chromiumos/platform2/libbrillo/
This allows AOSP to cherry pick or merge changes directly back into their fork.