Roll Skia from cda0cfaadfd7 to 8ff4fd208c26 (3 revisions)

https://skia.googlesource.com/skia.git/+log/cda0cfaadfd7..8ff4fd208c26

2023-08-31 armansito@google.com [graphite][dawn] Enable compute unit tests on Dawn
2023-08-31 johnstiles@google.com Disallow `texture2D` without readonly/writeonly qualifier.
2023-08-31 johnstiles@google.com Change meaning of `texture2D` to refer to read-write textures.

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 aaclarke@google.com,brianosman@google.com,jlavrova@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': 'cda0cfaadfd74ed2530b64c1802bd55e47c2c3c8',
+  'skia_revision': '8ff4fd208c2659f8a3711f3f3d60c37e301a8c34',
 
   # 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: eba393b91ae33edbef88daf270932c8c
+Signature: 0698d205cd9277d7158ff7fa50197801
 
 ====================================================================================================
 LIBRARY: etc1