GitLab

ninja runs gen_fuzzer_owners.py from build directory and
not chromium source root. This causes script to fail to
find owners since it checks source file from incorrect
relative location.
This regressed in
https://chromium.googlesource.com/chromium/src/+/3fb53cf0d187b9537160ad967975f17641d59c1f

R=mmoroz@chromium.org

Bug: 890352
Change-Id: Ib14884f294eadeaa87d08cd57062bf41d63f002e
Reviewed-on: https://chromium-review.googlesource.com/1252003Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595129}