Roll Skia from 2064111d555e to a139788b4c78 (1 revision) (#20768)

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': '2064111d555e9f2d71dd204d33c20d925b8ae4e2',
+  'skia_revision': 'a139788b4c7854eb5b485e4b6eca9582a4dabee6',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the