Roll src/third_party/skia 6bbeb4ab7222..31d587474367 (1 commits) (#9440)

https://skia.googlesource.com/skia.git
/%2Blog/6bbeb4ab7222..31d587474367

git log 6bbeb4ab722279aa20f1b4c793dbe5fbc0afadcc..31d58747436781d486bf622af90d22833372abe7 --date=short --no-merges --format=%ad %ae %s
2019-06-22 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps

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 (bsalomon@google.com), and stop
the roller if necessary.

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': '6bbeb4ab722279aa20f1b4c793dbe5fbc0afadcc',
+  'skia_revision': '31d58747436781d486bf622af90d22833372abe7',
 
   # 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: d3ed257c10f1112fc7ed5b44dcd7fc05
+Signature: 110de3da756c51739e538739f14259d7
 
 UNUSED LICENSES: