Roll src/third_party/skia e9e4421eff0c..c76ac8e325c7 (3 commits)

https://skia.googlesource.com/skia.git/+log/e9e4421eff0c..c76ac8e325c7

git log e9e4421eff0c..c76ac8e325c7 --date=short --first-parent --format='%ad %ae %s'
2019-12-19 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 0827bfec..358ffa26 (433 commits)
2019-12-19 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 751e78884a55..6423b7fc7ded (6 commits)
2019-12-19 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 21be09d8e699..4fd7fccd6db5 (4 commits)

Created with:
  gclient setdep -r src/third_party/skia@c76ac8e325c7

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 borenet@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: borenet@google.com
Change-Id: Icda0834c4c2261cf7712221e5b723e941837ba80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1975356Reviewed-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@{#726280}

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': 'e9e4421eff0c923a220a124b93ded5e0069a4a70',
+  'skia_revision': 'c76ac8e325c7f22e6d0f87bd110dc525a8938ca0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.