Roll Skia from 4f23dec7427b to 4ef108e6d17a (3 revisions)

https://skia.googlesource.com/skia.git/+log/4f23dec7427b..4ef108e6d17a

2020-12-30 adlai@google.com Reland "Yank out old reduceOpsTaskSplitting code"
2020-12-30 adlai@google.com Reland "Have DDLs honor the reduceOpsTaskSplittingFlag"
2020-12-30 fmalita@chromium.org [svg] Convert text rendering to RSX form

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 djsollen@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: chromium:1146701
Tbr: djsollen@google.com
Change-Id: I8027411698d0223746cb5692fe4a47b5c0957e8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2607455Reviewed-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@{#839781}

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': '4f23dec7427b7f04a29b0295aaaeeb3c755fab06',
+  'skia_revision': '4ef108e6d17ae4242c9538a3f99677e03c1ff667',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.