Roll src/third_party/skia d7d93001ead2..4273a150f84d (1 commits) (flutter/engine#8224)

https://skia.googlesource.com/skia.git/%2Blog/d7d93001ead2..4273a150f84d

git log d7d93001ead20ddf31d2c4352ccf2fd6b87f791b..4273a150f84d70a9acc340261fd5e7be1af310a5 --date=short --no-merges --format=%ad %ae %s
2019-03-20 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader f2564656e7af..3e485a4f3ec8 (1 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 (brianosman@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': 'd7d93001ead20ddf31d2c4352ccf2fd6b87f791b',
+  'skia_revision': '4273a150f84d70a9acc340261fd5e7be1af310a5',
 
   # 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: 8074c43ec379bde76e8bce94445a404b
+Signature: 0a2fd38c998e20b99ec89e55e3387451
 
 UNUSED LICENSES: