https://skia.googlesource.com/skia.git/+log/9a6cece5a830..5e744acfad58

2020-12-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from 251ba5cb119f to 27e52ca05dc7 (24 revisions)
2020-12-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn from 3668d352bc5f to 30805557e651 (33 revisions)
2020-12-09 reed@google.com Revert "Revert "Use explicit samplingoptions""
2020-12-09 reed@google.com Revert "Use explicit samplingoptions"
2020-12-09 johnstiles@google.com Add $genHType versions of frexp and ldexp.

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

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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