Roll Skia from f9e20555c20d to 2a26c50a628f (3 revisions)

https://skia.googlesource.com/skia.git/+log/f9e20555c20d..2a26c50a628f

2021-08-26 csmartdalton@google.com Store the correct number of samples in GrProgramInfo
2021-08-26 csmartdalton@google.com Use drawVertices instead of SkDraw for MSAA hairline points
2021-08-26 johnstiles@google.com Move error checking into VarDeclaration::Convert.

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 herb@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

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/main/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: herb@google.com
Change-Id: Ifb6dc736339678471c23f17365108e14a2ad286b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3123288
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#915692}
diff --git a/DEPS b/DEPS
index f8760705..0c2cf21 100644
--- a/DEPS
+++ b/DEPS
@@ -228,7 +228,7 @@
   # 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': 'f9e20555c20d1087694880fee0a378483abb6b36',
+  'skia_revision': '2a26c50a628fbc6363bff432489c3facab4341ec',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.