Add a testing/variations/OWNERS file
Add a testing/variations/OWNERS file

R=rkaplow@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/1372193005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#352361}

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