Mojo: fix typo in comment.

Change-Id: If7c315b390fd77b7cef1ec37a8c90f6578ab62e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1569111
Auto-Submit: Matthew Cary <mattcary@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#651276}
1 file changed