Roll src/third_party/skia b4d60b5eda31..5b4c0ee19b74 (1 commits)

https://skia.googlesource.com/skia.git/+log/b4d60b5eda31..5b4c0ee19b74

git log b4d60b5eda31..5b4c0ee19b74 --date=short --no-merges --format='%ad %ae %s'
2019-09-23 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader b6fa949c4539..1f89f58faeb8 (5 commits)

Created with:
  gclient setdep -r src/third_party/skia@5b4c0ee19b74

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 bungeman@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=bungeman@google.com

Bug: chromium:None
Change-Id: I73c6ae54ec1c248059f721f1ccca7febb16732d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1819000Reviewed-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@{#698823}

DEPS

@@ -162,7 +162,7 @@ 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': 'b4d60b5eda31c7c03bb30424d6a1a3e841830a76',
+  'skia_revision': '5b4c0ee19b74cbd12ce0ea60a3c92024d113a6e7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.