Roll Skia from 66bce0c26f97 to 421c360abe76 (2 revisions) (#25803)

diff --git a/DEPS b/DEPS
index 7b312c1..afdfec6 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': '66bce0c26f97fd138c6b0257c55743d7e10d15f0',
+  'skia_revision': '421c360abe763148935eb84a133ddb9eab179209',
 
   # 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 28e1ffe..e98042c 100644
--- a/ci/licenses_golden/licenses_skia
+++ b/ci/licenses_golden/licenses_skia
@@ -1,4 +1,4 @@
-Signature: 2199be33086f26381999646a73b29af9
+Signature: 802ac458f515a416333176a4fb744039
 
 UNUSED LICENSES: