Roll src/third_party/skia f346df396a23..1383a38e1d92 (8 commits) (flutter#8440)

https://skia.googlesource.com/skia.git/%2Blog/f346df396a23..1383a38e1d92

git log f346df396a23adde4bd93f17067a9b17549acc84..1383a38e1d92fb70d94185b454daa6c1afecc6a0 --date=short --no-merges --format=%ad %ae %s
2019-04-03 bungeman@google.com Allow users to create stock shaping iterators.
2019-04-04 robertphillips@google.com Revert "Stop using pendingIO in read/writeSurfacePixels"
2019-04-04 reed@google.com Revert "rely on clients to opt in to legacy enums"
2019-04-04 kjlubick@google.com [canvaskit] Make SkImageShader from SkImage
2019-04-03 ethannicholas@google.com SkSL now properly errors when invocations are used outside of a geometry shader
2019-04-03 robertphillips@google.com Stop using pendingIO in read/writeSurfacePixels
2019-03-29 kjlubick@google.com [canvaskit] adding drawAtlas to canvas API
2019-04-03 reed@google.com rely on clients to opt in to legacy enums

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 (jlavrova@google.com), and stop
the roller if necessary.

Author: skia-flutter-autoroll

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': 'f346df396a23adde4bd93f17067a9b17549acc84',
+  'skia_revision': '1383a38e1d92fb70d94185b454daa6c1afecc6a0',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: 9c97c7b3d56c573e76b98566579a4509
+Signature: ac694f519e0c290649e1f013c837ee67
 
 UNUSED LICENSES: