Roll Skia from 8e77631a80f0 to a6df9da28963 (17 revisions) (flutter#20202)

Author: skia-flutter-autoroll

DEPS

@@ -26,7 +26,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '8e77631a80f09ef22222330599a2acbe89fb0446',
+  'skia_revision': 'a6df9da289630f9ea3698b6eb82543b756a71090',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 971bdf525d6d356dc41f0eb6c3848846
+Signature: 648bb8c8a92f1eab892fdc727826b4db
 
 UNUSED LICENSES:
 
@@ -3432,7 +3432,6 @@ FILE: ../../../third_party/skia/src/gpu/gradients/GrLinearGradientLayout.fp
 FILE: ../../../third_party/skia/src/gpu/gradients/GrRadialGradientLayout.fp
 FILE: ../../../third_party/skia/src/gpu/gradients/GrSingleIntervalGradientColorizer.fp
 FILE: ../../../third_party/skia/src/gpu/gradients/GrSweepGradientLayout.fp
-FILE: ../../../third_party/skia/src/gpu/gradients/GrTextureGradientColorizer.fp
 FILE: ../../../third_party/skia/src/gpu/gradients/GrTiledGradientEffect.fp
 FILE: ../../../third_party/skia/src/gpu/gradients/GrTwoPointConicalGradientLayout.fp
 FILE: ../../../third_party/skia/src/gpu/gradients/GrUnrolledBinaryGradientColorizer.fp
@@ -3448,8 +3447,6 @@ FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrSingleIntervalGrad
 FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrSingleIntervalGradientColorizer.h
 FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrSweepGradientLayout.cpp
 FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrSweepGradientLayout.h
-FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrTextureGradientColorizer.cpp
-FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrTextureGradientColorizer.h
 FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrTiledGradientEffect.cpp
 FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrTiledGradientEffect.h
 FILE: ../../../third_party/skia/src/gpu/gradients/generated/GrTwoPointConicalGradientLayout.cpp
@@ -5673,6 +5670,7 @@ TYPE: LicenseType.bsd
 FILE: ../../../third_party/skia/fuzz/FuzzCreateDDL.cpp
 FILE: ../../../third_party/skia/fuzz/oss_fuzz/FuzzAPICreateDDL.cpp
 FILE: ../../../third_party/skia/fuzz/oss_fuzz/FuzzAPISVGCanvas.cpp
+FILE: ../../../third_party/skia/fuzz/oss_fuzz/FuzzSKP.cpp
 FILE: ../../../third_party/skia/fuzz/oss_fuzz/FuzzSVG.cpp
 FILE: ../../../third_party/skia/fuzz/oss_fuzz/FuzzSkRuntimeEffect.cpp
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