Roll src/third_party/skia 4ef464cd3c2e..7ffa40cedbc4 (10 commits) (flutter/engine#6334)

https://skia.googlesource.com/skia.git/+log/4ef464cd3c2e..7ffa40cedbc4


Created with:
  gclient setdep -r src/third_party/skia@7ffa40cedbc4

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, who should
be CC'd on the roll, 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': '4ef464cd3c2e4cecddf2441cc44b0c0eb8b90e8e',
+  'skia_revision': '7ffa40cedbc42f36576c6dc7c65738df32d418c4',
 
   # 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: 9c92ef1ca8a48b8fdc3abe2d3f436f89
+Signature: 84c01d32f94563b5bab1a3853df2464a
 
 UNUSED LICENSES: