Roll src/third_party/skia 12f1fecea947..867da4b96e8e (1 commits) (#7936)

https://skia.googlesource.com/skia.git/%2Blog/12f1fecea947..867da4b96e8e

git log 12f1fecea947a675ff10bfd1b9728bc7a3ac9ab3..867da4b96e8eb591e15951f9fee719c67a0d8638 --date=short --no-merges --format=%ad %ae %s
2019-02-22 kjlubick@google.com Allow system harfbuzz.

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

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '12f1fecea947a675ff10bfd1b9728bc7a3ac9ab3',
+  'skia_revision': '867da4b96e8eb591e15951f9fee719c67a0d8638',
 
   # 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: 0f228c02be89de75623e1f47baba2176
+Signature: cd59a5bfaf4496e454556730936f07b3
 
 UNUSED LICENSES: