Roll src/third_party/skia 776d81525e7c..ab52a7a53db6 (1 commits) (#12393)

https://skia.googlesource.com/skia.git/+log/776d81525e7c..ab52a7a53db6

git log 776d81525e7c..ab52a7a53db6 --date=short --no-merges --format='%ad %ae %s'
2019-09-23 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

Created with:
  gclient setdep -r src/third_party/skia@ab52a7a53db6

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 bungeman@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=bungeman@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': '776d81525e7c152235c1642053b9dd13e93be8c1',
+  'skia_revision': 'ab52a7a53db6ab1060d366d989f1b797f2b2f598',
 
   # 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: a4203e050a6699eaf0a5359f3feaaa73
+Signature: bb75bc3812bd490831a12ffccde8b758
 
 UNUSED LICENSES: