Roll src/third_party/skia b27667a15a15..3f6a2ac63670 (1 commits) (flutter/engine#8401)

https://skia.googlesource.com/skia.git/%2Blog/b27667a15a15..3f6a2ac63670

git log b27667a15a15ce31d135538a409c419c0b8b0d1b..3f6a2ac636700b5bb27834938de3b43f71a33beb --date=short --no-merges --format=%ad %ae %s
2019-04-01 reed@google.com remove unneeded asACompose

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 (jlavrova@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': 'b27667a15a15ce31d135538a409c419c0b8b0d1b',
+  'skia_revision': '3f6a2ac636700b5bb27834938de3b43f71a33beb',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 0cafcf3959b077da7fab02aca9869893
+Signature: 306f5a1810c6049ffe81737c06b9b818
 
 UNUSED LICENSES: