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This was initially made to run on Release builds because of a lack of
opinon about it. We'd prefer to have an actual Debug build now.

Related to
https://chromium-review.googlesource.com/c/chromium/tools/build/+/1801697

Change-Id: Ie0d89334207af382d54fd27a1c40a6c56ba69cb5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1803443
Commit-Queue: Arthur Hemery <ahemery@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697573}