Roll src/third_party/skia bd67d0035a80..b4d60b5eda31 (7 commits) (#12389)

https://skia.googlesource.com/skia.git/+log/bd67d0035a80..b4d60b5eda31

git log bd67d0035a80..b4d60b5eda31 --date=short --no-merges --format='%ad %ae %s'
2019-09-22 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-22 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update SKP version
2019-09-22 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps
2019-09-22 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-21 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-21 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps
2019-09-21 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

Created with:
  gclient setdep -r src/third_party/skia@b4d60b5eda31

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC bungeman@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: None
TBR=bungeman@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': 'bd67d0035a80966b328b5399be1b6c973b7c4caf',
+  'skia_revision': 'b4d60b5eda31c7c03bb30424d6a1a3e841830a76',
 
   # 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: bcfd7dcdf29f6e49e43df40d3c4a6013
+Signature: edfaa58ddaf64ba8994151c56826b0a9
 
 UNUSED LICENSES: