Roll src/third_party/skia bff2939b6249..105c9d507045 (2 commits) (flutter/engine#10252)

https://skia.googlesource.com/skia.git
/compare/bff2939b6249..105c9d507045

git log bff2939b624903efa4e99c9095c778f3edf63e6e..105c9d507045dc700d0e2f25854e9f86913069ba --date=short --no-merges --format=%ad %ae %s
2019-07-30 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps
2019-07-30 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 a96b79f90940..cbabea734cbd (6 commits)

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 (benjaminwagner@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': 'bff2939b624903efa4e99c9095c778f3edf63e6e',
+  'skia_revision': '105c9d507045dc700d0e2f25854e9f86913069ba',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 5cae9182665bb197af3f965201000966
+Signature: 0f047e5036b6499e977ac23d1edf363b
 
 UNUSED LICENSES: