Roll Skia from 42a741a2145c to 58a26a83628c (4 revisions)

https://skia.googlesource.com/skia.git/+log/42a741a2145c..58a26a83628c

2020-10-23 csmartdalton@google.com Fix the formula for fNumRadialSegmentsPerRadian in GrStrokePatchBuilder
2020-10-23 johnstiles@google.com Add unit test for nested function calls in FP files.
2020-10-23 reed@google.com Show cubic made up of 2 quads
2020-10-23 johnstiles@google.com Revive SkSLFPTestbed for basic verification of CPP/H codegen.

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 egdaniel@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: egdaniel@google.com
Change-Id: Id7e6b89b0915cb939688a4b63c53bddd6c3a7bec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2495692Reviewed-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@{#820497}

DEPS

@@ -206,7 +206,7 @@ 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': '42a741a2145c825b909327a520ebbb9b712e8fff',
+  'skia_revision': '58a26a83628c42bb7de10ae6cd953aa823e9ee30',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.