Roll src/third_party/skia f29cb70281d5..6a19e03047cc (5 commits) (#13198)

https://skia.googlesource.com/skia.git/+log/f29cb70281d5..6a19e03047cc

git log f29cb70281d5..6a19e03047cc --date=short --no-merges --format='%ad %ae %s'
2019-10-17 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps
2019-10-17 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 9097eeb5359b..6652f0b64287 (11 commits)
2019-10-17 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src fbf280c2d283..e27799abf3f0 (477 commits)
2019-10-17 hcm@google.com update formatting, add links
2019-10-17 mtklein@google.com add bsl.16b, cmeq.4s, cmgt.4s

Created with:
  gclient setdep -r src/third_party/skia@6a19e03047cc

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 csmartdalton@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=csmartdalton@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': 'f29cb70281d5924da928b169a611ee6582c5cd90',
+  'skia_revision': '6a19e03047ccf5dc57d6bb63fa30093ea4175a6d',
 
   # 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: c48980e8b230bbfb6ef428a49cda2f22
+Signature: 1b82fdb126e1af1321b93cfff00b473d
 
 UNUSED LICENSES: