Roll Skia from 7a9744cc4cac to 9c8b5c656650 (2 revisions)

https://skia.googlesource.com/skia.git/+log/7a9744cc4cac..9c8b5c656650

2022-05-20 [email protected] Enable Matrix-Scalar math tests on all ANGLE Mac bots
2022-05-20 [email protected] [graphite] Handle dynamic instances that never accumulated anything

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 [email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

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/main/autoroll/README.md

DEPS

@@ -27,7 +27,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '7a9744cc4cac76054a8bdef13d96ac9c021a696a',
+  'skia_revision': '9c8b5c656650328d02311c9ee5fe07b2465b0e58',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 99f31a0493dc3155d785dbbf2fcd1298
+Signature: e917dec5e52e970dd95084bd918b97b9
 
 UNUSED LICENSES: