Roll src/third_party/skia 1f8a1d0e1e20..81dd8abf97e6 (1 commits)

https://skia.googlesource.com/skia.git/+log/1f8a1d0e1e20..81dd8abf97e6

git log 1f8a1d0e1e20..81dd8abf97e6 --date=short --first-parent --format='%ad %ae %s'
2020-04-05 reed@google.com More infix for skvm, add poly() helper for polynomial evaluations

Created with:
  gclient setdep -r src/third_party/skia@81dd8abf97e6

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/+/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: csmartdalton@google.com
Change-Id: I2c2041fc306f3982ba63fff25abb87eb9aef8765
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2136930Reviewed-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@{#756546}

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': '1f8a1d0e1e20f42090e31fec325bb52085aa2f66',
+  'skia_revision': '81dd8abf97e617217aa958c28ab4874f47e49644',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.