Roll src/third_party/skia 78fb80a2b328..73b8376b302a (2 commits)

https://skia.googlesource.com/skia.git/+log/78fb80a2b328..73b8376b302a

git log 78fb80a2b328..73b8376b302a --date=short --no-merges --format='%ad %ae %s'
2019-09-09 ethannicholas@google.com Fixed skslc assertion failure discovered by fuzzer
2019-09-09 brianosman@google.com Remove legacy flag: GrContextOptions::fDisallowGLSLBinaryCaching

Created with:
  gclient setdep -r src/third_party/skia@73b8376b302a

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
TBR=mtklein@google.com

Bug: None
Change-Id: Ic3f4a8bbc8b88cdf083591e080543dbfcecd7e29
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1791436Reviewed-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@{#694778}

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': '78fb80a2b328ed04956a1f661c3d3ce5fcf033e3',
+  'skia_revision': '73b8376b302ac3fd61ef4010f2bcc4fc2a48b5bc',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.