Avoid an unnecessary copy in IsSafeHeader.

We can just tell //base to act case-insensitively.

Change-Id: I5d4a9ecfa09cd7fada0b0af792d0f414de888904
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1575172
Auto-Submit: David Benjamin <davidben@chromium.org>
Reviewed-by: Eric Roman <eroman@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652685}
1 file changed