Roll src/third_party/skia 8f42e2467cd9..4f050fb81955 (1 commits) (#7343)

https://skia.googlesource.com/skia.git/%2Blog/8f42e2467cd9..4f050fb81955

git log 8f42e2467cd9db91605323d3517ade57ff0c60c2..4f050fb81955d4df54d89469fcd8dc029c8d7d05 --date=short --no-merges --format=%ad %ae %s
2019-01-01 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset

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 (bungeman@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': '8f42e2467cd9db91605323d3517ade57ff0c60c2',
+  'skia_revision': '4f050fb81955d4df54d89469fcd8dc029c8d7d05',
 
   # 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: 639c21940158cc0d5240b6aa057f42a3
+Signature: 80f6dd5dde23052fe944449551a2a05c
 
 UNUSED LICENSES: