Roll Skia from 9f4b81aac175 to c675298ddeda (2 revisions)

https://skia.googlesource.com/skia.git/+log/9f4b81aac175..c675298ddeda

2023-08-22 brianosman@google.com Remove logic for obsolete devices from nano_flags
2023-08-22 johnstiles@google.com Add support for Graphite unit tests that modify context options.

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 brianosman@google.com,jimgraham@google.com,lovisolo@google.com,rmistry@google.com 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

Author: skia-flutter-autoroll

DEPS

@@ -18,7 +18,7 @@ vars = {
   'llvm_git': 'https://llvm.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '9f4b81aac17518742d0e7ed2049c8e1997b3d4f9',
+  'skia_revision': 'c675298ddedad679098c558af3a4e10f88ed6cf6',
 
   # 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: 26c65b583955348aad7ae43d6f8ef5d2
+Signature: 71cc76e4ce67de40cc7c3ef6c21fa7b5
 
 ====================================================================================================
 LIBRARY: etc1