Roll Skia from 162f47d6b6bd to 46ec77ae3954 (2 revisions) (flutter#173833)

https://skia.googlesource.com/skia.git/+log/162f47d6b6bd..46ec77ae3954

2025-08-15 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE
from 899f3505748e to 63d8f74cdf9c (5 revisions)
2025-08-15 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn
from e07d4f333e72 to 8f680a2a9cb9 (9 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
chinmaygarde@google.com,kjlubick@google.com,robertphillips@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': '162f47d6b6bda69d1ecb128801dbe316060b120a',
+  'skia_revision': '46ec77ae39545acb1d6734028d9e2fbfef55f1c3',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.