Roll src/third_party/skia 1acf79a3e5b8..d962070feb84 (4 commits) (flutter/engine#8404)

https://skia.googlesource.com/skia.git/%2Blog/1acf79a3e5b8..d962070feb84

git log 1acf79a3e5b8abfca56193e4643b51f3c552389c..d962070feb84a95e25d99f0a6ad26fd59d32e60b --date=short --no-merges --format=%ad %ae %s
2019-04-01 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-04-02 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-04-02 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 3115a0fc17fa..6cb0cff57376 (9 commits)
2019-04-02 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src e01c3e081ff3..b3f3a36219a1 (475 commits)

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (jlavrova@google.com), and stop
the roller if necessary.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '1acf79a3e5b8abfca56193e4643b51f3c552389c',
+  'skia_revision': 'd962070feb84a95e25d99f0a6ad26fd59d32e60b',
 
   # 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: 08adfe2d0f5ce7869685f29f69bdf8e9
+Signature: 7bb93da4b03881db83e145aaeca6df36
 
 UNUSED LICENSES: