Roll src/third_party/skia 3ac3a4053f86..a47eb455360f (2 commits) (flutter#7389)

https://skia.googlesource.com/skia.git/%2Blog/3ac3a4053f86..a47eb455360f

git log 3ac3a4053f861060a217d3a6eac6dee71cd862cc..a47eb455360f5c34147eaa9073f3a2c289615a6c --date=short --no-merges --format=%ad %ae %s
2019-01-07 [email protected] Update go_deps asset
2019-01-06 [email protected] [*kit] fulfil promise immediately

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 ([email protected]), and stop
the roller if necessary.

Author: skia-flutter-autoroll

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': '3ac3a4053f861060a217d3a6eac6dee71cd862cc',
+  'skia_revision': 'a47eb455360f5c34147eaa9073f3a2c289615a6c',
 
   # 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: 89cf76eb2927928cd729e5014e938294
+Signature: 0f1f1f998e11cfb49edf6df3f33eaa98
 
 UNUSED LICENSES: