Roll Skia from 066f411b2ae6 to d15c52d2333e (3 revisions)

https://skia.googlesource.com/skia.git/+log/066f411b2ae6..d15c52d2333e

2021-02-23 herb@google.com make GrTextBlob::addMultiMaskFormat private
2021-02-23 johnstiles@google.com Performance experiment: Disable SkSL optimization in nanobench/skpbench
2021-02-23 reed@google.com Flutter does use legacy image.makeShader()

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-lottie-ci-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

Change-Id: Ie63865929053287c08f864bd836b267c4de53111
Cq-Include-Trybots: skia/skia.primary:Housekeeper-PerCommit-InfraTests
Tbr: borenet@google.com
Reviewed-on: https://skia-review.googlesource.com/c/lottie-ci/+/374399
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 12755b2..7e33372 100644
--- a/DEPS
+++ b/DEPS
@@ -11,7 +11,7 @@
   # 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': '066f411b2ae6154c5639553c3b3a98000dfa33b4',
+  'skia_revision': 'd15c52d2333e9b3f732fe2b14e38c1952298d5ec',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.