Roll Skia from d169e1915cba to a4b9169fb6b3 (1 revision)

https://skia.googlesource.com/skia.git/+log/d169e1915cba..a4b9169fb6b3

2020-08-10 brianosman@google.com Remove 'in' variables from SkRuntimeEffect

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: I5e3fee42c110c48bdafb74c5170effa945aa4c4b
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/309242
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 1adf4ba..44988df 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': 'd169e1915cba8caaddabb22b3672c7cefa91bfa2',
+  'skia_revision': 'a4b9169fb6b35baf997e59bdce94663b8db34596',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.