Roll src/third_party/skia 255569187f27..1223e7fc0a3c (4 commits)

https://skia.googlesource.com/skia.git/+log/255569187f27..1223e7fc0a3c


git log 255569187f27..1223e7fc0a3c --date=short --no-merges --format='%ad %ae %s'
2019-03-01 jvanverth@google.com Add GrMtlPipelineStateCache.
2019-03-01 fmalita@chromium.org [canvaskit] Ignore image paths in Skottie asset keys
2019-03-01 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 5546fb4fdd85..1581ff030b9c (2 commits)
2019-03-01 fmalita@chromium.org [canvaskit] Consolidate Skottie assets


Created with:
  gclient setdep -r src/third_party/skia@1223e7fc0a3c

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=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=scroggo@chromium.org

Change-Id: Ic0f2304e92186dbead9ddcfe115ae59bfea274f7
Reviewed-on: https://chromium-review.googlesource.com/c/1496895Reviewed-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@{#636851}

DEPS

@@ -127,7 +127,7 @@ 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': '255569187f27d854a78ce67a62713fadc2d5e292',
+  'skia_revision': '1223e7fc0a3c150d5f7b9d832af0368753cbbb9e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.