Please fill out the relevant section and delete the others.

=== Create or edit a Git repo ===
googlesource host (e.g. chromium, chrome-internal): chromium
name of the repo: external/github.com/google/go-cmp
is it a mirror, and of what: https://github.com/google/go-cmp
permissions: no local commits. read-only mirror of github repo.

We need a mirror of
  https://github.com/google/go-cmp
on chromium gerrit as
  https://chromium.googlesource.com/external/github.com/google/go-cmp