Roll src/third_party/skia f4c80c322597..c70966b3505e (2 commits)

https://skia.googlesource.com/skia.git/+log/f4c80c322597..c70966b3505e

git log f4c80c322597..c70966b3505e --date=short --no-merges --format='%ad %ae %s'
2019-10-21 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-10-21 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 6dee176c8d7d..4a80ba25e67b (13 commits)

Created with:
  gclient setdep -r src/third_party/skia@c70966b3505e

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 michaelludwig@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
TBR=michaelludwig@google.com

Bug: chromium:None
Change-Id: I83adf702dd44d988f2f75b26f206d680c86984db
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1871333Reviewed-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@{#707739}

DEPS

@@ -167,7 +167,7 @@ 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': 'f4c80c32259730d082b91d4461b167a1e4d86b13',
+  'skia_revision': 'c70966b3505ec8ca2b9863d5916ecae2a4fa7399',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.