Roll src/third_party/skia 69537d798994..b484e7ce24c9 (8 commits) (flutter#13065)

https://skia.googlesource.com/skia.git/+log/69537d798994..b484e7ce24c9

git log 69537d798994..b484e7ce24c9 --date=short --no-merges --format='%ad %ae %s'
2019-10-10 mtklein@google.com hand off frames to encoder as they come
2019-10-10 robertphillips@google.com Pass GrProgramInfo further down Vulkan call chain
2019-10-10 jvanverth@google.com Draw perspective text as paths.
2019-10-10 robertphillips@google.com Add computation of requestedFeatures to GrProgramInfo and use it
2019-10-10 kjlubick@google.com [debugger] Use alternate buffer
2019-10-10 nigeltao@google.com Update Wuffs version to 0.2.0-rc.1
2019-10-10 fmalita@chromium.org [SkVideoEncoder] Allow clients to control the color type
2019-10-10 brianosman@google.com Roll third_party/externals/angle2 8e7d9d6c2326..5d9c4ee328bc (9 commits)

Created with:
  gclient setdep -r src/third_party/skia@b484e7ce24c9

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 kjlubick@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=kjlubick@google.com

Author: skia-flutter-autoroll

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': '69537d79899407c4f4a5882a793b46fbf7f87256',
+  'skia_revision': 'b484e7ce24c9d4505dec124a6bf5a3725ec5ac28',
 
   # 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: ba296e9c922a24c8e319e4995b8205ac
+Signature: e937e0043b19e12a38abe70f66f807cf
 
 UNUSED LICENSES: