Roll src/third_party/skia 4a6e84920793..92ca3baba6a5 (6 commits)

https://skia.googlesource.com/skia.git/+log/4a6e84920793..92ca3baba6a5

git log 4a6e84920793..92ca3baba6a5 --date=short --first-parent --format='%ad %ae %s'
2020-01-08 mtklein@google.com JIT today's new _imm ops
2020-01-08 herb@google.com Hoist calculations up to regenerate
2020-01-08 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-01-08 mtklein@google.com skip no-op masks
2020-01-08 egdaniel@google.com Move the remainder of GrRenderTargetContext factories.
2020-01-08 mtklein@google.com refactor bit ops

Created with:
  gclient setdep -r src/third_party/skia@92ca3baba6a5

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: I10eaa1bed08c8d239f46be047b8199c8d12442ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1992726Reviewed-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@{#729630}

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': '4a6e84920793bd6f98c4a15f2eda90b7e4074a7b',
+  'skia_revision': '92ca3baba6a5d4c385ca684dc9db660efa1f2d94',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.