Roll src/third_party/skia/ 4dc5a4540..8e3bf09e8 (5 commits)

https://skia.googlesource.com/skia.git/+log/4dc5a454052e..8e3bf09e8eb7

$ git log 4dc5a4540..8e3bf09e8 --date=short --no-merges --format='%ad %ae %s'
2018-05-21 benjaminwagner Omit failing test.
2018-05-21 enne Fix unit tests when workarounds are enabled
2018-05-03 egdaniel Reland "Remove GrBackendObject and all related functions from Skia."
2018-05-21 bsalomon Add perspective support to GrTextureOp.
2018-05-21 egdaniel Move gn setup for vulkan library/headers into their own third_party directory.

Created with:
  roll-dep src/third_party/skia


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=allanmac@chromium.org

Change-Id: I657d5cf312f7eb7100c2412fe8c0348faafa2686
Reviewed-on: https://chromium-review.googlesource.com/1067590
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#560363}

DEPS

@@ -96,7 +96,7 @@ 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': '4dc5a454052e64227ecbfadd903f590d9361be08',
+  'skia_revision': '8e3bf09e8eb73a7377c41cd833482465c0d14562',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.