Roll src/third_party/skia 4a152d340f06..f3f8ac37e468 (1 commits) (flutter/engine#13283)

https://skia.googlesource.com/skia.git/+log/4a152d340f06..f3f8ac37e468

git log 4a152d340f06..f3f8ac37e468 --date=short --no-merges --format='%ad %ae %s'
2019-10-22 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 4a80ba25e67b..5335faaece2a (2 commits)

Created with:
  gclient setdep -r src/third_party/skia@f3f8ac37e468

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC michaelludwig@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: None
TBR=michaelludwig@google.com

DEPS

@@ -26,7 +26,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '4a152d340f06e5907c04d8362e39e539f06d509b',
+  'skia_revision': 'f3f8ac37e4684b7190025e2be4aa179e811017c2',
 
   # 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: f8604527c0e87f541d803dd42493652d
+Signature: 26050bb5bdea59ebe1a19f1e3a09d403
 
 UNUSED LICENSES: