Roll src/third_party/skia 491df6ba72d3..7e46b14d8494 (6 commits)

https://skia.googlesource.com/skia.git/+log/491df6ba72d3..7e46b14d8494

git log 491df6ba72d3..7e46b14d8494 --date=short --first-parent --format='%ad %ae %s'
2020-03-06 nifong@google.com Replace red line skp with a prettier example
2020-03-06 kjlubick@google.com [canvaskit] Fix shadow bugs
2020-03-06 jlavrova@google.com Cache resolved typefaces by Unichar + SkFontStyle + locale
2020-03-06 mtklein@google.com fix comment
2020-03-06 mtklein@google.com move dither in SkVMBlitter
2020-03-06 mtklein@google.com set up interpreter after llvm

Created with:
  gclient setdep -r src/third_party/skia@7e46b14d8494

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 herb@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: herb@google.com
Change-Id: I5342ff70935a6406ad9cb2849801e726816b7a9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2091668Reviewed-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@{#747850}

DEPS

@@ -175,7 +175,7 @@ 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': '491df6ba72d3ab27c16ef04862b7714bf3c85433',
+  'skia_revision': '7e46b14d849469dd3afa86e573fd5a441064a7cb',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.