Roll src/third_party/skia 67c921abaac3..56cde4923f9f (3 commits) (#18435)

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': '67c921abaac30c1b3d46e48455fa08f26abac624',
+  'skia_revision': '56cde4923f9f9157cbb13906fb6dc40ecc9a5c6f',
 
   # 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: 4e2e1cf68fd7d1e15badf1df06f9c907
+Signature: 54437d3876473afb089161750a13ff3c
 
 UNUSED LICENSES:
 
@@ -2775,6 +2775,7 @@ FILE: ../../../third_party/skia/src/core/SkDrawLooper.cpp
 FILE: ../../../third_party/skia/src/core/SkFontStream.h
 FILE: ../../../third_party/skia/src/core/SkGpuBlurUtils.cpp
 FILE: ../../../third_party/skia/src/core/SkGpuBlurUtils.h
+FILE: ../../../third_party/skia/src/core/SkLegacyGpuBlurUtils.cpp
 FILE: ../../../third_party/skia/src/core/SkMatrixUtils.h
 FILE: ../../../third_party/skia/src/core/SkMessageBus.h
 FILE: ../../../third_party/skia/src/core/SkMipMap.cpp