Roll Skia from d12046432dba to 973009b04ba3 (1 revision)

https://skia.googlesource.com/skia.git/+log/d12046432dba..973009b04ba3

2021-02-17 johnstiles@google.com Clean up type coercion code and IRGenerator::checkValid().

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: Id1a90619ffd7e58d6daea4917669b96ecac0a7a0
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/374037
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 71b5536..2c9863e 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': 'd12046432dba115225ba8abeb7a52c82b8fff14f',
+  'skia_revision': '973009b04ba30a728bc54cab53450d47e521352a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.