Roll src/third_party/skia 706eb5788e8b..9b59953e77b9 (3 commits) (#14511)

https://skia.googlesource.com/skia.git/+log/706eb5788e8b..9b59953e77b9

git log 706eb5788e8b..9b59953e77b9 --date=short --first-parent --format='%ad %ae %s'
2019-12-16 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 1d77542f5681..d1860ea17e8e (14 commits)
2019-12-16 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader ebb0bec91552..fbbfeb700295 (2 commits)
2019-12-16 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src d11c17148d1a..b1568f298495 (510 commits)

Created with:
  gclient setdep -r src/third_party/skia@9b59953e77b9

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 borenet@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: borenet@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': '706eb5788e8b7cc7e211989807eeb517a6ced38d',
+  'skia_revision': '9b59953e77b96b85abcbfe1988cc8a3c49ab5dcd',
 
   # 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: a2c3e0d7bceafcedef9ef8a758c2d987
+Signature: 2461e804dabf60a3bd139b1d1aaa3255
 
 UNUSED LICENSES: