Update the test_data_chromium.cc comment

We no longer generate a giant C++ file, but we still need this because
of Chromium test infrastructure limitations.

Change-Id: Ia89af9682155f0b22a1ebb9857746f095ce85278
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5548173
Auto-Submit: David Benjamin <davidben@chromium.org>
Reviewed-by: Bob Beck <bbe@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1319245}
NOKEYCHECK=True
GitOrigin-RevId: cd52a684c771084d75cec3dc39e49bbda8e5643f
1 file changed