Roll src/third_party/skia 51874e3e3712..b0ababfe5ad2 (1 commits) (flutter/engine#8449)

https://skia.googlesource.com/skia.git/%2Blog/51874e3e3712..b0ababfe5ad2

git log 51874e3e371230e2cc02912ed0c9ddb569e48532..b0ababfe5ad2bddf4b900991cbc5ba8e6c9040b4 --date=short --no-merges --format=%ad %ae %s
2019-04-04 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

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': '51874e3e371230e2cc02912ed0c9ddb569e48532',
+  'skia_revision': 'b0ababfe5ad2bddf4b900991cbc5ba8e6c9040b4',
 
   # 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: 71fc8d0d1ecce72de33ca2aa449ab4a7
+Signature: 95ea5cf5394065d98bb6333e68d495bf
 
 UNUSED LICENSES: