Roll Skia from 4559368cc4a1 to 8614e4925896 (4 revisions)

https://skia.googlesource.com/skia.git/+log/4559368cc4a1..8614e4925896

2020-09-21 johnstiles@google.com Replace VariableReference::copy_constant with clone().
2020-09-21 bsalomon@google.com Stop building GL backend on Android Vulkan builders
2020-09-21 jvanverth@google.com Fix D3D non-dev release build.
2020-09-21 johnstiles@google.com Allow a BasicBlock to be dumped, outside the CFG.

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 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/+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
Cq-Do-Not-Cancel-Tryjobs: true
Bug: None
Tbr: csmartdalton@google.com
Change-Id: I672ee4ade5c45465a096856f34217d7d9aa38c71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422209Reviewed-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@{#808957}

DEPS

@@ -195,7 +195,7 @@ 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': '4559368cc4a16ac20f571b505529cb226f822c13',
+  'skia_revision': '8614e49258968994e6787237ec177c57193565b8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.