Roll Skia from ff418c512205 to 6ff0fdf79bfa (2 revisions) (#47874)

https://skia.googlesource.com/skia.git/+log/ff418c512205..6ff0fdf79bfa

2023-11-09 johnstiles@google.com Disable PixelLocalStorage test to allow Dawn to roll.
2023-11-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skcms from 5037b3433fc8 to 5274816f3d53 (1 revision)

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 bdero@google.com,brianosman@google.com,fmalita@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://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

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': 'ff418c512205ac288581a8c02f95fe8884f3392a',
+  'skia_revision': '6ff0fdf79bfa8baf79c778e2713f4aa01fba26a6',
 
   # 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: f15ab5c34e5ac93c7f07b0f0f91b86a1
+Signature: 053995d7c19709add601ca6dec84f452
 
 ====================================================================================================
 LIBRARY: etc1