Roll src/third_party/skia c096654fa7c6..867ab81687fc (4 commits) (#12417)

https://skia.googlesource.com/skia.git/+log/c096654fa7c6..867ab81687fc

git log c096654fa7c6..867ab81687fc --date=short --no-merges --format='%ad %ae %s'
2019-09-24 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 a905cbcdc21b..6d625bfe6e8a (3 commits)
2019-09-24 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps
2019-09-24 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 82de2e611e32..a76152f4e4ce (372 commits)
2019-09-24 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 1f89f58faeb8..e3a5983705da (1 commits)

Created with:
  gclient setdep -r src/third_party/skia@867ab81687fc

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 bungeman@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=bungeman@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': 'c096654fa7c64fc2dccf38ca6ddd37f0e906000e',
+  'skia_revision': '867ab81687fc65d7346dde2b69217e54eddb767d',
 
   # 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: 3be4898d42fc943cefa24af65ef716fc
+Signature: 16a6b7bac4808ce9e5a24f2c89421c0d
 
 UNUSED LICENSES: