Roll src/third_party/skia f90bfd72174b..15c91422339a (1 commits) (#8900)

https://skia.googlesource.com/skia.git
/%2Blog/f90bfd72174b..15c91422339a

git log f90bfd72174b8bdb7b585e00c9bb2db772870a08..15c91422339a0383a6ae366d9bf55c69e304b303 --date=short --no-merges --format=%ad %ae %s
2019-05-07 robertphillips@google.com Repro Chrome bug and add Skia-side fix

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 (robertphillips@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': 'f90bfd72174b8bdb7b585e00c9bb2db772870a08',
+  'skia_revision': '15c91422339a0383a6ae366d9bf55c69e304b303',
 
   # 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: a5fab3b6a19f8a8f243eaeb2eb250dc7
+Signature: 496df67ad5e7d7134f4a569784252e81
 
 UNUSED LICENSES: