Roll Skia from 2ffed2e4c6f8 to 8931359a74f1 (4 revisions) (#42139)

https://skia.googlesource.com/skia.git/+log/2ffed2e4c6f8..8931359a74f1

2023-05-18 johnstiles@google.com Always add braces when writing child statements in WGSL.
2023-05-18 johnstiles@google.com Eliminate DSLFunction entirely.
2023-05-18 michaelludwig@google.com [skif] Delete legacy SkColorFilterImageFilter impl
2023-05-18 michaelludwig@google.com [skif] Don't evaluate empty-source filters for SkNoDrawCanvases

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 brianosman@google.com,johnstiles@google.com,rmistry@google.com,zra@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

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': '2ffed2e4c6f883017d39dca3ee7221e8dd53a09b',
+  'skia_revision': '8931359a74f1973d2832754669ff419c8c6e86cd',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 8062816ee1dcccd6f6b75fe432b67722
+Signature: 91601bfab047f42c579d880f2e034866
 
 ====================================================================================================
 LIBRARY: etc1
@@ -7994,8 +7994,6 @@ ORIGIN: ../../../third_party/skia/src/sksl/SkSLParser.cpp + ../../../third_party
 ORIGIN: ../../../third_party/skia/src/sksl/SkSLParser.h + ../../../third_party/skia/LICENSE
 ORIGIN: ../../../third_party/skia/src/sksl/SkSLPosition.h + ../../../third_party/skia/LICENSE
 ORIGIN: ../../../third_party/skia/src/sksl/SkSLProgramKind.h + ../../../third_party/skia/LICENSE
-ORIGIN: ../../../third_party/skia/src/sksl/dsl/DSLFunction.cpp + ../../../third_party/skia/LICENSE
-ORIGIN: ../../../third_party/skia/src/sksl/dsl/DSLFunction.h + ../../../third_party/skia/LICENSE
 ORIGIN: ../../../third_party/skia/src/sksl/dsl/DSLStatement.cpp + ../../../third_party/skia/LICENSE
 ORIGIN: ../../../third_party/skia/src/sksl/dsl/DSLStatement.h + ../../../third_party/skia/LICENSE
 ORIGIN: ../../../third_party/skia/src/sksl/ir/SkSLFunctionDeclaration.cpp + ../../../third_party/skia/LICENSE
@@ -8031,8 +8029,6 @@ FILE: ../../../third_party/skia/src/sksl/SkSLParser.cpp
 FILE: ../../../third_party/skia/src/sksl/SkSLParser.h
 FILE: ../../../third_party/skia/src/sksl/SkSLPosition.h
 FILE: ../../../third_party/skia/src/sksl/SkSLProgramKind.h
-FILE: ../../../third_party/skia/src/sksl/dsl/DSLFunction.cpp
-FILE: ../../../third_party/skia/src/sksl/dsl/DSLFunction.h
 FILE: ../../../third_party/skia/src/sksl/dsl/DSLStatement.cpp
 FILE: ../../../third_party/skia/src/sksl/dsl/DSLStatement.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLFunctionDeclaration.cpp