Roll src/third_party/skia 4ab4e641f151..4a4400d9e9fa (8 commits)

https://skia.googlesource.com/skia.git/+log/4ab4e641f151..4a4400d9e9fa

git log 4ab4e641f151..4a4400d9e9fa --date=short --no-merges --format='%ad %ae %s'
2019-10-24 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-10-24 herb@google.com Fix fuzzer bug in SkDescriptor::isValid
2019-10-24 fmalita@chromium.org Slightly faster hsl_to_rgb stage
2019-10-24 robertphillips@google.com Revert "Allow direct readback for formats in non-ES OpenGL"
2019-10-24 csmartdalton@google.com Don't keep "outResultsFile" open in nanobench
2019-10-24 mtklein@google.com restore _DXDY image shader on ARM
2019-10-24 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-10-24 bsalomon@google.com Allow direct readback for formats in non-ES OpenGL

Created with:
  gclient setdep -r src/third_party/skia@4a4400d9e9fa

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 michaelludwig@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/+/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
TBR=michaelludwig@google.com

Bug: chromium:b/143074513
Change-Id: Iebc12a2367684d181b48c642cd64595de72bb997
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1879310Reviewed-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@{#709115}

DEPS

@@ -171,7 +171,7 @@ 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': '4ab4e641f151a2adc9d644d9da42f452c3d4fdff',
+  'skia_revision': '4a4400d9e9fa41776441e3909ea7505080c8cdb9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.