Roll src/third_party/skia e25b4472cdd9..176da0bb8a10 (10 commits) (#8422)

https://skia.googlesource.com/skia.git/%2Blog/e25b4472cdd9..176da0bb8a10

git log e25b4472cdd9f09cd393c9c34651218507c9847b..176da0bb8a1002d2fe4c4edf4ce9fde609bda256 --date=short --no-merges --format=%ad %ae %s
2019-04-03 mtklein@google.com tiny tweak: no need to reload lottie files
2019-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src b3f3a36219a1..38969ffb5d49 (477 commits)
2019-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 6cb0cff57376..89899748a858 (11 commits)
2019-04-02 bsalomon@google.com Control access to adding ref to a GrGpuResource when it's ref count is zero.
2019-04-02 ethannicholas@google.com added support for half input variables in SkSL fragment processors
2019-04-03 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 459453a96257..2b9fb4bf5ece (7 commits)
2019-04-02 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-04-02 fmalita@chromium.org [skottie] Add support for (non-standard) v-centered text
2019-04-03 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-04-02 mtklein@google.com have FM run GMs in command line order

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': 'e25b4472cdd9f09cd393c9c34651218507c9847b',
+  'skia_revision': '176da0bb8a1002d2fe4c4edf4ce9fde609bda256',
 
   # 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: c3208174f8bb78461fab6e1835080c02
+Signature: d2b388a2bb49f02fe66504bd06401ebf
 
 UNUSED LICENSES: