Roll Skia from 6aea07880248 to cdff3fcba638 (2 revisions)

https://skia.googlesource.com/skia.git/+log/6aea07880248..cdff3fcba638

2020-12-21 johnstiles@google.com Add support for nulls in BasicBlock::Node::description.
2020-12-21 scroggo@google.com SkAnimatedImage: Always respect exif orientation

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

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux-blink-rel;luci.chromium.try:linux-chromeos-compile-dbg;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Cq-Do-Not-Cancel-Tryjobs: true
Bug: None
Tbr: bungeman@google.com
Change-Id: I2da02f3ba58f14f287ac8b9fc88505da9c9bdcf2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2599466Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#838727}

DEPS

@@ -199,7 +199,7 @@ vars = {
   # 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': '6aea07880248b361958db393a083f9546c99b097',
+  'skia_revision': 'cdff3fcba6384563c48465f06eb10d48ab77e5b3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.