Roll Skia from 29a015f8712b to ab13fd19dd32 (2 revisions) (flutter#175108)

https://skia.googlesource.com/skia.git/+log/29a015f8712b..ab13fd19dd32

2025-09-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn
from 7e45e468cf42 to 5189c201ee9c (21 revisions)
2025-09-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll
vulkan-deps from af8c2ea541d3 to 0022e4eac4b2 (7 revisions)

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,brettos@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

@@ -14,7 +14,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': '29a015f8712bdc375980792d65cec8bd1db227ab',
+  'skia_revision': 'ab13fd19dd32f8bd862359331cb3d5ad8de64700',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.