Roll src/third_party/skia c445c7d5c87b..674ee74e88d7 (4 commits)

https://skia.googlesource.com/skia.git/+log/c445c7d5c87b..674ee74e88d7

git log c445c7d5c87b..674ee74e88d7 --date=short --no-merges --format='%ad %ae %s'
2019-08-27 egdaniel@google.com Make sure we use clear load op on GrOpsTask as often as possible.
2019-08-27 michaelludwig@google.com Fix subset errors in blur, matrix, and morphology filters
2019-08-27 senorblanco@chromium.org Dawn: use Skia's copy of vulkan headers.
2019-08-27 senorblanco@chromium.org Add spirv-cross to DEPS.

Created with:
  gclient setdep -r src/third_party/skia@674ee74e88d7

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 stani@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=stani@google.com

Bug: None
Change-Id: I60516dbc444f7e86d1f0ab4812af671bdb54567b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1771663
Reviewed-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@{#690854}

• DEPS[diff]