GitLab

Makes subcategories searchable, but they don't appear in the search
result snippets.

Bug: b/172533871
Change-Id: I6b1e053929bc1a4ecada135ae582a5deba1e673a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2620740
Commit-Queue: Zufeng Wang <zufeng@google.com>
Reviewed-by: dstockwell <dstockwell@google.com>
Cr-Commit-Position: refs/heads/master@{#842374}