Roll src/third_party/skia 76616a10a786..c519fed6ddce (3 commits) (#7366)

https://skia.googlesource.com/skia.git/%2Blog/76616a10a786..c519fed6ddce

git log 76616a10a78604139cb3da13ef051246fe8fb828..c519fed6ddce2f0c10234fa66a3312a9a7992846 --date=short --no-merges --format=%ad %ae %s
2019-01-04 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-01-03 reed@google.com start to build with no paint-text fields
2019-01-03 reed@google.com fix conditionals for flag

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': '76616a10a78604139cb3da13ef051246fe8fb828',
+  'skia_revision': 'c519fed6ddce2f0c10234fa66a3312a9a7992846',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: c88dc6544e8b3a0f66595155fdc9db06
+Signature: 025df76e63c4cab63fb1cd323b753cb7
 
 UNUSED LICENSES: