Roll Skia from ec79349bad50 to 671177905d22 (4 revisions) (#25888)

DEPS

diff --git a/DEPS b/DEPS
index d1dec77..deb7be9 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': 'ec79349bad504b253ac90473e59aed739609c0f0',
+  'skia_revision': '671177905d22a2fe08ece4a3395ac774b3e34fb7',
 
   # 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

diff --git a/ci/licenses_golden/licenses_skia b/ci/licenses_golden/licenses_skia
index 265cddd..36637f7 100644
--- a/ci/licenses_golden/licenses_skia
+++ b/ci/licenses_golden/licenses_skia
@@ -1,4 +1,4 @@
-Signature: 5115a1581915f53539375d9b9326482b
+Signature: b5238310d07f5146b747d3504ae04e73
 
 UNUSED LICENSES: