Before the Git integration Xrefs and files were served from a joint tar ball and the revision of that tar ball was available via a file in the root of the repo shown in code search. With the change to direct access from Git together with layered repos to accommodate DEPS, Xrefs and files match different revisions and the previously used revision file is gone.
Comment 1 by emso@chromium.org
, Nov 2 2017Status: Available (was: Assigned)