Roll src/third_party/skia c65d0069ec56..107c66669d37 (4 commits) (flutter/engine#15088)

https://skia.googlesource.com/skia.git/+log/c65d0069ec56..107c66669d37

git log c65d0069ec56..107c66669d37 --date=short --first-parent --format='%ad %ae %s'
2019-12-30 brianosman@google.com Make it safe to include SkRuntimeEffect.h from client code
2019-12-30 mtklein@google.com clarify that there's no kMedium here
2019-12-30 mtklein@google.com refresh image shader cs/at logic
2019-12-30 brianosman@google.com More SkRuntimeEffect tests

Created with:
  gclient setdep -r src/third_party/skia@107c66669d37

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 nifong@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: nifong@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': 'c65d0069ec56aa972e1fd18c3d3915db5bad3498',
+  'skia_revision': '107c66669d3758b2f7c46d9c5e63e465dfb98b5d',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: f007fee54178c5ba1096f625f8e7fc6a
+Signature: 92fcc79063817c720b6f66ff7c2222eb
 
 UNUSED LICENSES: