Roll src/third_party/skia 55ff5d3ba881..1337f5b85978 (10 commits) (#7407)

https://skia.googlesource.com/skia.git/%2Blog/55ff5d3ba881..1337f5b85978

git log 55ff5d3ba88117c667214fc6b4e08768eddc11b2..1337f5b859787de20c368d0d3f089b2e698c1848 --date=short --no-merges --format=%ad %ae %s
2019-01-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 eb278cb04e97..6344d8ea30d7 (1 commits)
2019-01-08 reed@google.com fix docs after removing kPreserveLCDText_SaveLayerFlag
2019-01-08 ethannicholas@google.com disallow varying matrices in shaders
2019-01-07 ethannicholas@google.com fixed SPIR-V indexing a swizzle
2019-01-07 halcanary@google.com drawText Cleanup
2019-01-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms cecf6c0ebb91..1747706b4afe (1 commits)
2019-01-07 fmalita@chromium.org Remove SkCanvas::kPreserveLCDText_SaveLayerFlag
2019-01-07 egdaniel@google.com Don't store the length and checksom on the GrProgramDesc key itself.
2019-01-08 jcgregorio@google.com skottie - Use our new skottie-inline-sk element.
2019-01-08 mtklein@google.com Revert "update p3 GM"

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 (bsalomon@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': '55ff5d3ba88117c667214fc6b4e08768eddc11b2',
+  'skia_revision': '1337f5b859787de20c368d0d3f089b2e698c1848',
 
   # 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: 0222c6392d38b4226f5a319107914b40
+Signature: 290221be541fa4e78852f2eb54b5ad1c
 
 UNUSED LICENSES: