Roll src/third_party/skia 2c2240f66805..067861e14821 (6 commits) (#8636)

https://skia.googlesource.com/skia.git/%2Blog/2c2240f66805..067861e14821

git log 2c2240f66805ac852507f7eea010c153b42485e3..067861e1482118dd7071c931a90127c5ca0c9b21 --date=short --no-merges --format=%ad %ae %s
2019-04-18 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-04-18 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-04-18 reed@google.com remove experimental from some APIs (that are no longer experiments)
2019-04-18 michaelludwig@google.com Fix quad type detection from SkPoint array
2019-04-18 brianosman@google.com Remove the axis-aligned vector special case to convexity checker
2019-04-18 ethannicholas@google.com fixed assertion failure in skslc SPIR-V output

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 (herb@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': '2c2240f66805ac852507f7eea010c153b42485e3',
+  'skia_revision': '067861e1482118dd7071c931a90127c5ca0c9b21',
 
   # 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: cfb77cf37f6efc85c500050d0c6ff422
+Signature: 69e8aeb209ca2d1f280e0b5fef4a35cb
 
 UNUSED LICENSES: