Roll src/third_party/skia 871d40b74c63..eb1d5a2e233c (2 commits)

https://skia.googlesource.com/skia.git/+log/871d40b74c63..eb1d5a2e233c

git log 871d40b74c63..eb1d5a2e233c --date=short --first-parent --format='%ad %ae %s'
2020-04-14 reed@google.com Move markerstack into its own object:
2020-04-14 brianosman@google.com Fail gracefully in SkSLSlide on raster backend

Created with:
  gclient setdep -r src/third_party/skia@eb1d5a2e233c

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 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

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: kjlubick@google.com
Change-Id: Id9e0f6b00895e07fde879669bafe1a1804f28824
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2149262Reviewed-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@{#758892}

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': '871d40b74c6320a523b806ec9aebc74641e93af6',
+  'skia_revision': 'eb1d5a2e233ccfa7d0f6e0ac7355bf4a17aff2d0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.