Roll src/third_party/skia 28abea51fa9b..a6350f021e9a (6 commits)

https://skia.googlesource.com/skia.git/+log/28abea51fa9b..a6350f021e9a

git log 28abea51fa9b..a6350f021e9a --date=short --first-parent --format='%ad %ae %s'
2020-02-19 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-02-19 brianosman@google.com Revert "Add SkSLCompiler::toHLSL, using SPIRV-Cross"
2020-02-19 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-02-19 reed@google.com add fling to rotating cube
2020-02-19 brianosman@google.com Add SkSLCompiler::toHLSL, using SPIRV-Cross
2020-02-19 jlavrova@google.com Bug fixes

Created with:
  gclient setdep -r src/third_party/skia@a6350f021e9a

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 lovisolo@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: lovisolo@google.com
Change-Id: Ib67178d3a74b8844396db87d0276ca614c89485c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2064284
Reviewed-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@{#742849}

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': '28abea51fa9bf4e7a0dd8df5e02ac8fcc1e33e1e',
+  'skia_revision': 'a6350f021e9ac2ed881ac1029f57fd5ed6108453',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.