Roll Skia from 552a81a6c78b to 768843b52f9d (1 revision) (#27285)

DEPS

@@ -27,7 +27,7 @@ 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': '552a81a6c78b8409ed7251578ff85cd414fc305e',
+  'skia_revision': '768843b52f9ddbefa676818d61ce36718fed723b',
 
   # 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: 6ffa4b0e6e38550915cf352228b4003d
+Signature: b1b83f892ac3fe1757ac7f162e527610
 
 UNUSED LICENSES: