Roll src/third_party/skia f8221786d088..8566dda51b42 (4 commits) (#11220)

https://skia.googlesource.com/skia.git/+log/f8221786d088..8566dda51b42

git log f8221786d088..8566dda51b42 --date=short --no-merges --format='%ad %ae %s'
2019-08-19 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-08-19 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms 958fec279ed5..d931999c3afd (1 commits)
2019-08-19 egdaniel@google.com Remove some unused GrPixelConfig functions.
2019-08-19 csmartdalton@google.com Add kRequiresManualMSAAResolve to GrInternalSurfaceFlags

Created with:
  gclient setdep -r src/third_party/skia@8566dda51b42

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, who should
be CC'd on the roll, and stop the roller if necessary.


Bug: None
TBR=egdaniel@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': 'f8221786d088017322f06e8c25a0890b333853ff',
+  'skia_revision': '8566dda51b421a9c2c6a7e8659fe3948a1fab3c9',
 
   # 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: 550a39c11c1de54a798c725280b7e439
+Signature: 847dd20c66a35c65d8202e8cb2dda66a
 
 UNUSED LICENSES: