Roll src/third_party/skia be0d7dfa6194..9a9841178078 (2 commits) (#12368)

https://skia.googlesource.com/skia.git/+log/be0d7dfa6194..9a9841178078

git log be0d7dfa6194..9a9841178078 --date=short --no-merges --format='%ad %ae %s'
2019-09-20 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 bf4268a3963b..6c4ff5ddab07 (8 commits)
2019-09-20 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps

Created with:
  gclient setdep -r src/third_party/skia@9a9841178078

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC brianosman@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

Bug: None
TBR=brianosman@google.com

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': 'be0d7dfa619474a3d5f4f3e32892461096da60db',
+  'skia_revision': '9a98411780788d33bb954e32bb5d1271b3c2571e',
 
   # 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: aa14ec9e26a5beb730b24741b52b8763
+Signature: c0a5eb325a9ad489407d5f11982b5864
 
 UNUSED LICENSES: