Roll Skia from 84902ce006f0 to d91cd6b5ee2b (2 revisions)

https://skia.googlesource.com/skia.git/+log/84902ce006f0..d91cd6b5ee2b

2020-09-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from 210fb6b5 to 7a93e029 (467 revisions)
2020-09-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from 75690ce7ef4a to e63aa953ddfd (2 revisions)

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/+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: michaelludwig@google.com
Change-Id: Ib6485c6ae29d552007899fc264237a93a5377273
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2391874Reviewed-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@{#804534}

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': '84902ce006f021d4f6483261f5b5c73f9c06fdfd',
+  'skia_revision': 'd91cd6b5ee2ba545dc14cffd583668b72eb65a7c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.