Roll src/third_party/skia d92e4e9de7f1..f93a8436cea5 (1 commits) (#16029)

https://skia.googlesource.com/skia.git/+log/d92e4e9de7f1..f93a8436cea5

git log d92e4e9de7f1..f93a8436cea5 --date=short --first-parent --format='%ad %ae %s'
2020-01-26 mtklein@google.com support dither in skvm

Created with:
  gclient setdep -r src/third_party/skia@f93a8436cea5

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 reed@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: reed@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': 'd92e4e9de7f15df3a36ddb4a7d116e971d534e24',
+  'skia_revision': 'f93a8436cea522ea60e60d9f91fac35be3f32d1f',
 
   # 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: 569a4da77a077a383a573c85bf61cb55
+Signature: d5695393aee1663b1f15935739292821
 
 UNUSED LICENSES: