Roll src/third_party/skia 93ce79dba4d9..6ed63968a391 (3 commits)

https://skia.googlesource.com/skia.git/+log/93ce79dba4d9..6ed63968a391


git log 93ce79dba4d9..6ed63968a391 --date=short --no-merges --format='%ad %ae %s'
2018-08-10 timliang@google.com implemented GrMtlPipelineState for metal gpu backend
2018-08-10 timliang@google.com implemented SK_CLOCKWISE_BUILTIN for Metal SkSLC
2018-08-10 egdaniel@google.com Make sure GrResourceCache frees resources waiting on messages during destruction.


Created with:
  gclient setdep -r src/third_party/skia@6ed63968a391

The AutoRoll server is located here: https://autoroll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;luci.chromium.try:android_optional_gpu_tests_rel;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=djsollen@chromium.org

Change-Id: I62fa0889abc2e48f9d33832a1e5e276c6f3bc83e
Reviewed-on: https://chromium-review.googlesource.com/1169705Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#582198}

DEPS

@@ -105,7 +105,7 @@ 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': '93ce79dba4d99ee3b654f465a5cc5822221924ce',
+  'skia_revision': '6ed63968a39131df7a6b01600bf32c32800be05d',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.