Add pkasting as a styleguide/c++ OWNER.

Bug: none
Change-Id: I10962ec970ff1843ad6cb19fce2df0554e99633c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1512497
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639167}
1 file changed