Roll src/third_party/skia/ a886544a7..5cb5c74ef (8 commits)

https://skia.googlesource.com/skia.git/+log/a886544a7bf7..5cb5c74efdac

$ git log a886544a7..5cb5c74ef --date=short --no-merges --format='%ad %ae %s'
2018-04-27 borenet Reland "[recipes] Use named caches for git and workdirs"
2018-04-27 reed use std::atomic in SkRegionPriv
2018-04-27 angle-skia-autoroll Roll third_party/externals/angle2/ 467c15f97..de279590a (1 commit)
2018-04-27 skcms-skia-autoroll Roll skia/third_party/skcms 5a327ce..dd901e0 (1 commits)
2018-04-27 ethannicholas workaround for Intel OpCompositeConstruct bug
2018-04-26 fmalita [skottie] Apply opaque masks as clips
2018-04-27 rmistry Revert "Remove Android compile bot from the CQ"
2018-04-26 benjaminwagner [infra] Specify machine_type dimension for Linux GCE bots.

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=stani@chromium.org

Change-Id: Ib9444275488575c786a1b6d5ac1841bb427a477a
Reviewed-on: https://chromium-review.googlesource.com/1033487
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@{#554498}

DEPS

@@ -90,7 +90,7 @@ 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': 'a886544a7bf727a8f0d75597df99474dcba97273',
+  'skia_revision': '5cb5c74efdac46a1f9af37ff9707bc9d2c900083',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.