Roll Skia from 344ff9c41fb6 to 4251aa7454da (2 revisions) (flutter#179779)

https://skia.googlesource.com/skia.git/+log/344ff9c41fb6..4251aa7454da

2025-12-12 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn
from f39150de4906 to 83072ee716dc (25 revisions)
2025-12-12
recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com
Roll recipe dependencies (trivial).

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 jimgraham@google.com,kjlubick@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: engine-flutter-autoroll

DEPS

@@ -15,7 +15,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': '344ff9c41fb671ba6c9d9dda4e6f37c50d0ad0d9',
+  'skia_revision': '4251aa7454da8b57b9d75010518564e68111dd47',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.