Roll Chromium Variations from 763e08a4e6f8 to 2f859928ffba (27 revisions)

https://chromium.googlesource.com/chromium-variations.git/+log/763e08a4e6f8..2f859928ffba

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/chromium-variations-chromium
Please CC chrome-metrics-team@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Chromium Variations: https://bugs.chromium.org/p/chromium/issues/entry
To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: chrome-metrics-team@google.com
Change-Id: Ie4d7126c0b0a658df94c21a63af95b6f513840fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5406591
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1280065}