Roll src/third_party/skia 6ea680581fa6..8969a1641bec (5 commits)

https://skia.googlesource.com/skia.git/+log/6ea680581fa6..8969a1641bec

git log 6ea680581fa6..8969a1641bec --date=short --first-parent --format='%ad %ae %s'
2020-01-06 benjaminwagner@google.com Add missing Metal jobs
2020-01-06 mtklein@google.com support kDecal in skvm image shader
2020-01-06 mtklein@google.com expand skvm image shader
2020-01-06 herb@google.com Make fBrokenRun local to doRegen.
2020-01-06 bsalomon@google.com Rename GrSimpleTextureEffect->GrTextureEffect

Created with:
  gclient setdep -r src/third_party/skia@8969a1641bec

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 jvanverth@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
Bug: None
Tbr: jvanverth@google.com
Change-Id: I90d4210c08f7166ab865a973590e668a43a58e19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1989108Reviewed-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@{#728811}

DEPS

@@ -181,7 +181,7 @@ 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': '6ea680581fa60717c32e4c71d205ebfac69de207',
+  'skia_revision': '8969a1641beced679ea5981e57d59103e1786330',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.