Roll src/third_party/skia 8b99b9e1d11c..8a78e9cdc30e (4 commits)

https://skia.googlesource.com/skia.git/+log/8b99b9e1d11c..8a78e9cdc30e

git log 8b99b9e1d11c..8a78e9cdc30e --date=short --first-parent --format='%ad %ae %s'
2020-03-31 bsalomon@google.com Don't require color type to wrap a texture/RT.
2020-03-31 brianosman@google.com Move SkDraw to use SkVerticesPriv, remove redundant private API
2020-03-31 jvanverth@google.com Allow GrD3DTextureResourceInfo to include declared D3D12 types.
2020-03-31 mtklein@google.com small int->Val hunt

Created with:
  gclient setdep -r src/third_party/skia@8a78e9cdc30e

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: None
Tbr: michaelludwig@google.com
Change-Id: I325b6fe6f10dd5eedc55a4a39bd2ea4a7f17f392
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2130831Reviewed-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@{#755141}

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': '8b99b9e1d11cc9f7f2a10d058c628dc09e889fec',
+  'skia_revision': '8a78e9cdc30e6384cc1ad5da977d95a8d5bd0f5a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.