Roll src/third_party/skia 776293dceefd..5d92ae2b56df (1 commits) (#16325)

https://skia.googlesource.com/skia.git/+log/776293dceefd..5d92ae2b56df

git log 776293dceefd..5d92ae2b56df --date=short --first-parent --format='%ad %ae %s'
2020-02-01 brianosman@google.com Implement constantOutputForConstantInput in GrColorSpaceXformEffect

Created with:
  gclient setdep -r src/third_party/skia@5d92ae2b56df

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': '776293dceefd76522452b6d3b44270e92277bd25',
+  'skia_revision': '5d92ae2b56df03d46db5dde04c8a0affdc3b4cff',
 
   # 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: 536ce8226f1dd5ba43dd853d64569575
+Signature: c30a2230805c6a8782a9f6a4f3880fcc
 
 UNUSED LICENSES: