Roll src/third_party/skia 3e01360..aa4f7f5 (3 commits) (#14153)

https://skia.googlesource.com/skia.git/+log/3e01360677b2..aa4f7f55829d

git log 3e01360..aa4f7f5 --date=short --first-parent --format='%ad %ae %s'
2019-12-06 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src a25cc4cdcd47..36a639fc2d93 (535 commits)
2019-12-06 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader dee5b5f3cf3f..b9f03f47d5f5 (14 commits)
2019-12-06 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 5f85783..11e6944 (8 commits)

Created with:
  gclient setdep -r src/third_party/skia@aa4f7f55829d

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 bsalomon@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: bsalomon@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': '3e01360677b2babae9a4a63641aad10bda804fac',
+  'skia_revision': 'aa4f7f55829d1d600dcdd196f0d7accd4c4b1333',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: 2368c13278da0eade44ebc8c4468975a
+Signature: bdf22e71fb98405640221ab9e009258e
 
 UNUSED LICENSES: