Roll src/third_party/skia 436d47d5bde9..09198525261a (6 commits) (#8012)

https://skia.googlesource.com/skia.git/%2Blog/436d47d5bde9..09198525261a

git log 436d47d5bde9849dbec03579d8d99a6df33c380f..09198525261aa5152c2183158315d81176776d99 --date=short --no-merges --format=%ad %ae %s
2019-03-01 reed@google.com use colorspace steps to determine legacy blits
2019-03-01 jvanverth@google.com Fix memory leak in Metal.
2019-03-01 jvanverth@google.com Restore old Viewer setup order.
2019-03-01 egdaniel@google.com Add flush call to take access type, flags, and semaphore.
2019-03-01 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 1581ff030b9c..6f1a852fce0b (3 commits)
2019-03-01 recipe-roller@chromium.org Roll recipe dependencies (trivial).

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 (scroggo@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': '436d47d5bde9849dbec03579d8d99a6df33c380f',
+  'skia_revision': '09198525261aa5152c2183158315d81176776d99',
 
   # 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: 21d92947550af3e9514c1ae863ff3e59
+Signature: 614fb46c9f0811dad283390a278f8b0d
 
 UNUSED LICENSES: