Roll src/third_party/skia 469046c09657..8cbedf985570 (2 commits)

https://skia.googlesource.com/skia.git/+log/469046c09657..8cbedf985570

git log 469046c09657..8cbedf985570 --date=short --first-parent --format='%ad %ae %s'
2020-03-31 brianosman@google.com Improve SkVerticesPriv ergonomics
2020-03-31 robertphillips@google.com Reduce GrGlyph's functionality

Created with:
  gclient setdep -r src/third_party/skia@8cbedf985570

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-autoroll
Please CC michaelludwig@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

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux-blink-rel;luci.chromium.try:linux-chromeos-compile-dbg;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Bug: chromium:1056730
Tbr: michaelludwig@google.com
Change-Id: I2e0457de93a8a63ad86faa6014015165ea7791ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2129859Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#755028}

DEPS

@@ -175,7 +175,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': '469046c096578b22167df9a6b0d0251f95b0f314',
+  'skia_revision': '8cbedf985570030185b55ff0609e8c5898d0ef7f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.