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This prevents triggering a NOTREACHED() for internal projects that have
a very large number of variations.

Bug: b:162438420
Change-Id: I171062c0d462e56f70cc6eb7ebeb279169279333
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2332571Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795684}