Roll Skia from 2d8849f9f0cc to 15f77147a3ec (1 revision) (flutter#45414)

https://skia.googlesource.com/skia.git/+log/2d8849f9f0cc..15f77147a3ec

2023-09-02 skia-autoroll@skia-public.iam.gserviceaccount.com Roll vulkan-deps from 8643aba2c123 to 33e34e073cab (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 aaclarke@google.com,brianosman@google.com,jlavrova@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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': '2d8849f9f0cc2f0aee566ed1e8a73a4cbda0ff5b',
+  'skia_revision': '15f77147a3ec47bc3bfd840aae4f71e725bf2171',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.