Update copyright headers in third_party/s*/

These files are used to import new versions of third-party code, to
integrate that code into Chromium, or are otherwise not from upstream.

The methodology used to generate this CL is documented in
https://crbug.com/1098010#c95.

No-Try: true
Bug: 1098010
Change-Id: Ibcf0f99b328f98a9e1c55d0cddac872277f6c346
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3926078
Reviewed-by: Mark Mentovai <mark@chromium.org>
Auto-Submit: Avi Drissman <avi@chromium.org>
Owners-Override: Avi Drissman <avi@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1053250}
NOKEYCHECK=True
GitOrigin-RevId: cd038c9516df1ef6ae77ca4435769e31a51470c8
4 files changed