Roll Skia from cb66e25d23d8 to 6f4bacb9df54 (2 revisions) (#26559)

diff --git a/DEPS b/DEPS
index 38a628b..0950d08 100644
--- a/DEPS
+++ b/DEPS
@@ -27,7 +27,7 @@
   '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': 'cb66e25d23d84fcecb4cf98e89d373958dfbfeb5',
+  'skia_revision': '6f4bacb9df54d7be6edee0140da595139fb820ca',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the
diff --git a/ci/licenses_golden/licenses_skia b/ci/licenses_golden/licenses_skia
index 3310539..5751b05 100644
--- a/ci/licenses_golden/licenses_skia
+++ b/ci/licenses_golden/licenses_skia
@@ -1,4 +1,4 @@
-Signature: 881de241583de3d0dda19d7abaaf4e80
+Signature: 7c6c0bd6c661f3de70cbf53c12dbfa66
 
 UNUSED LICENSES: