Roll src/third_party/skia 637c06aec7b1..d2916264aae0 (4 commits)

https://skia.googlesource.com/skia.git/+log/637c06aec7b1..d2916264aae0


git log 637c06aec7b1..d2916264aae0 --date=short --no-merges --format='%ad %ae %s'
2018-09-13 stephana@google.com [infra] Add pubsub emulator to gcloud asset
2018-09-13 brianosman@google.com Defer mip-mapping until lazy proxy instantiation
2018-09-13 mtklein@google.com add a linear gradient to P3 gm
2018-09-13 robertphillips@google.com Fix SkPath::reverseAddPath and fuzzing of SkPath enums


Created with:
  gclient setdep -r src/third_party/skia@d2916264aae0

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

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

BUG=chromium:882423
TBR=caryclark@chromium.org

Change-Id: Icc65a9c71f5c9970e104dad2d7e313a4fa2221b3
Reviewed-on: https://chromium-review.googlesource.com/1224591
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@{#591020}