Roll Skia from 6789b8240153 to 3c8ae888b9d4 (1 revision)

https://skia.googlesource.com/skia.git/+log/6789b8240153..3c8ae888b9d4

2021-07-15 jvanverth@google.com Revert "Fix directional shadows."

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-skiabot-test-autoroll
Please CC borenet@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/main/autoroll/README.md

Tbr: borenet@google.com
Change-Id: I8bc4ad922fe2c4366229ed71e26f02cd0da8cf47
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/428940
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index e2c48cd..95729bb 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
   # 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': '6789b824015373104bc3282c971e435a9f542f59',
+  'skia_revision': '3c8ae888b9d439640a8ebc461696e21c43c40a26',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.