Roll Skia from b4d60f8 to 473c9f4 (11 revisions) (#19594)

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': 'b4d60f807dbd034edf9fae1233aa1784f6c36d5c',
+  'skia_revision': '473c9f4cd9b21260b3948ae1ffdff0614e934ef0',
 
   # 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: c0f9efe50d10f17a075f7dc63197569a
+Signature: f12f0ec082378068113c65d77d1ff11e
 
 UNUSED LICENSES:
 
@@ -2795,7 +2795,6 @@ FILE: ../../../third_party/skia/src/effects/imagefilters/SkDropShadowImageFilter
 FILE: ../../../third_party/skia/src/effects/imagefilters/SkTileImageFilter.cpp
 FILE: ../../../third_party/skia/src/gpu/GrBlend.h
 FILE: ../../../third_party/skia/src/gpu/GrCaps.h
-FILE: ../../../third_party/skia/src/gpu/GrCoordTransform.h
 FILE: ../../../third_party/skia/src/gpu/GrGeometryProcessor.h
 FILE: ../../../third_party/skia/src/gpu/GrPaint.cpp
 FILE: ../../../third_party/skia/src/gpu/GrPathProcessor.cpp