Stifle lint warnings about header guards not being present in quic_flags_list.h

Change-Id: I3b76a2332b7a39ccb2c521d72ea908112fea2955
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1504005
Commit-Queue: Zhongyi Shi <zhongyi@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637945}
1 file changed