Roll Skia from a50940da6d67 to a8448470e80a (1 revision)

https://skia.googlesource.com/skia.git/+log/a50940da6d67..a8448470e80a

2021-02-19 mtklein@google.com cache whole luma color filter

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/master/autoroll/README.md

Tbr: borenet@google.com
Change-Id: Id11a3769f013a34e879de6853256b96f1571a65d
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/375188
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 e0aeaf1..a06d488 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': 'a50940da6d677632f2a8fdc962089f564a82b1c4',
+  'skia_revision': 'a8448470e80a52638d5664f8f8a1bbd9a59d145c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.