Roll Skia from a9306eb84f42 to 324578b5537d (6 revisions) (#19921)

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': 'a9306eb84f42bf9d9585c0917fd096f66d75a6aa',
+  'skia_revision': '324578b5537db057a40648aedc8aa840ea8f2475',
 
   # 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

-Signature: f466a8031733124574cae0872bd4a1d7
+Signature: e186e9f35f1a5c10aadf67c4e96c8146
 
 UNUSED LICENSES:
 
@@ -5295,6 +5295,7 @@ FILE: ../../../third_party/skia/modules/sksg/src/SkSGGeometryEffect.cpp
 FILE: ../../../third_party/skia/modules/skshaper/src/SkShaper_coretext.cpp
 FILE: ../../../third_party/skia/samplecode/Sample3D.cpp
 FILE: ../../../third_party/skia/samplecode/SampleFitCubicToCircle.cpp
+FILE: ../../../third_party/skia/samplecode/SampleSimpleStroker.cpp
 FILE: ../../../third_party/skia/src/core/SkColorFilterPriv.h
 FILE: ../../../third_party/skia/src/core/SkCompressedDataUtils.cpp
 FILE: ../../../third_party/skia/src/core/SkCompressedDataUtils.h