Roll src/third_party/skia 93e3c76a6543..e1b7afc8f3a1 (4 commits)

https://skia.googlesource.com/skia.git/+log/93e3c76a6543..e1b7afc8f3a1

git log 93e3c76a6543..e1b7afc8f3a1 --date=short --first-parent --format='%ad %ae %s'
2020-01-17 reed@google.com add guard to move to explicit matrix conversions
2020-01-17 fmalita@chromium.org [skottie] Cleanup: convert more effects to new animator pattern
2020-01-17 bsalomon@google.com Reland "Make SkGpuBlurUtils take SkTileMode""
2020-01-17 brianosman@google.com Switch coord transforms in gradient layouts to 3x3 (SkMatrix)

Created with:
  gclient setdep -r src/third_party/skia@e1b7afc8f3a1

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 mtklein@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: mtklein@google.com
Change-Id: If4318a0d238d6e82f3be59dae1064b5d6b29e31e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2007925Reviewed-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@{#732949}

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': '93e3c76a65430bc00c73f53477cb876ad54de785',
+  'skia_revision': 'e1b7afc8f3a143390e52ecf057579ad2cbef4989',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.