Roll Skia from 4f859fac52bc to 6804c35f1470 (1 revision) (#181161)

https://skia.googlesource.com/skia.git/+log/4f859fac52bc..6804c35f1470

2026-01-19 skia-autoroll@skia-public.iam.gserviceaccount.com Manual roll
Dawn from d14ae3d97ad7 to d6596a99bb7a (18 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 jimgraham@google.com,jlavrova@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

DEPS

diff --git a/DEPS b/DEPS
index 6dc3cf8..1a00316 100644
--- a/DEPS
+++ b/DEPS
@@ -15,7 +15,7 @@
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': '4f859fac52bc19c55139eccd33772f69077e0cf7',
+  'skia_revision': '6804c35f147093f6d43f8e08effdccfa3c37f2ae',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.