Roll src/third_party/skia 6e1b7bb..cd8b6d5 (10 commits) (#10980)

https://skia.googlesource.com/skia.git/+log/6e1b7bb2b5df..cd8b6d5c1cb8

git log 6e1b7bb..cd8b6d5 --date=short --no-merges --format='%ad %ae %s'
2019-08-13 bsalomon@google.com Add tolerance to ProcessorCloneTest and dump images on failure.
2019-08-13 csmartdalton@google.com Return kNearest from GrSkFilterQualityToGrFilterMode for 1x1 images
2019-08-13 benjaminwagner@google.com [gn] Don't use cc_wrapper for link steps
2019-08-13 senorblanco@chromium.org SkSL: implement full support for separate textures and samplers.
2019-08-13 bungeman@google.com Clean up some gm factory use.
2019-08-13 mtklein@google.com less clever skipMoveTo logic
2019-08-13 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-08-13 ethannicholas@google.com added error check for invalid 'in' variables
2019-08-13 mtklein@google.com rewrite SkDashPath.cpp's cull_path() logic
2019-08-13 halcanary@google.com experimental/editor/application: pre-shape text before showing window

Created with:
  gclient setdep -r src/third_party/skia@cd8b6d5c1cb8

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.


Bug: None
TBR=scroggo@google.com

DEPS

@@ -26,7 +26,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '6e1b7bb2b5df5e6c3a5225040f7674a126821c00',
+  'skia_revision': 'cd8b6d5c1cb87dc16df314f2a7a0248f3154f61a',
 
   # 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: c3a379567ce843828088389cd2173f0a
+Signature: be57a74eeb9b9e79dae773b4589d3807
 
 UNUSED LICENSES: