Roll src/third_party/skia a4b448831cee..47023272a11e (1 commits) (#11676)

https://skia.googlesource.com/skia.git/+log/a4b448831cee..47023272a11e

git log a4b448831cee..47023272a11e --date=short --no-merges --format='%ad %ae %s'
2019-08-29 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader cde4dd9601ce..eea9d35b8757 (10 commits)

Created with:
  gclient setdep -r src/third_party/skia@47023272a11e

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 stani@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=stani@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': 'a4b448831cee38ea9718031b62eaf87851d7c87e',
+  'skia_revision': '47023272a11e84550a1a04dd6396c3394960a242',
 
   # 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: 68c9f0e942ca2405115a6d1181f4ec75
+Signature: 2a04c55566f420f192795f4a795c82f4
 
 UNUSED LICENSES: