Roll src/third_party/skia 941b9ff09b25..3721688f64a5 (1 commits) (#9339)

https://skia.googlesource.com/skia.git
/%2Blog/941b9ff09b25..3721688f64a5

git log 941b9ff09b2553ec79933b4102fa2f8e5782e51d..3721688f64a5b94172829296dfcc307672a2b106 --date=short --no-merges --format=%ad %ae %s
2019-06-13 herb@google.com Make fMaskFormate private

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (herb@google.com), and stop
the roller if necessary.

DEPS

@@ -24,7 +24,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '941b9ff09b2553ec79933b4102fa2f8e5782e51d',
+  'skia_revision': '3721688f64a5b94172829296dfcc307672a2b106',
 
   # 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: 9c3645e060e778765553630ad291d4cc
+Signature: 196f9e594bc44eb14233e15bf14629f1
 
 UNUSED LICENSES: