Roll Skia from 88183900a5bd to 85aa42820e24 (4 revisions)

https://skia.googlesource.com/skia.git/+log/88183900a5bd..85aa42820e24

2020-06-11 robertphillips@google.com Move VkYcbcrSamplerHelper's context functionality into VkTestHelper
2020-06-11 mtklein@google.com require c++14 public headers
2020-06-11 bungeman@google.com Publicly depend on fontmgrs.
2020-06-11 herb@google.com simplify option flow

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 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/+doc/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: bungeman@google.com
Change-Id: Id68141259f8423c12ac77fa7d2677cf2975831ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2242152
Reviewed-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@{#777513}

DEPS

@@ -182,7 +182,7 @@ 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': '88183900a5bd4af91b75c71ae6e5ac841d604a11',
+  'skia_revision': '85aa42820e2435de98a20bdf9dab277fdd2a0311',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.