Roll src/third_party/skia 5fc138c04690..ef26fcb13fc6 (1 commits) (#7775)

https://skia.googlesource.com/skia.git/%2Blog/5fc138c04690..ef26fcb13fc6

git log 5fc138c046907808363d478d16c1a1f4767f654f..ef26fcb13fc6ae3943da82cad45a20d8497c3c98 --date=short --no-merges --format=%ad %ae %s
2019-02-10 fmalita@chromium.org [sksg] Fix image filter content inval rect tracking

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 (stephana@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': '5fc138c046907808363d478d16c1a1f4767f654f',
+  'skia_revision': 'ef26fcb13fc6ae3943da82cad45a20d8497c3c98',
 
   # 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: 18ecbc9e01b16e7ad48bc5f3faf53198
+Signature: 9dac5d9708ae15cefdef7347ad815e6f
 
 UNUSED LICENSES: