Roll src/third_party/skia b085fa9c8c19..cb4eb612f02f (5 commits)

https://skia.googlesource.com/skia.git/+log/b085fa9c8c19..cb4eb612f02f


git log b085fa9c8c19..cb4eb612f02f --date=short --no-merges --format='%ad %ae %s'
2019-03-06 kjlubick@google.com [canvaskit] Remove additional copies of CanvasKit when testing
2019-03-06 borenet@google.com [infra] Remove bookmaker bots
2019-03-06 reed@google.com change gm to use srgb (not linear) so srgb and legacy draw the same
2019-03-06 jvanverth@google.com Fix stencil setup in Metal
2019-03-06 kjlubick@google.com [canvaskit] Add particles integration


Created with:
  gclient setdep -r src/third_party/skia@cb4eb612f02f

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=reed@chromium.org

Change-Id: Iaa0424baaa2fd46ee4f7dd448a58bef96c290f75
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1505980Reviewed-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@{#638194}

DEPS

@@ -133,7 +133,7 @@ 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': 'b085fa9c8c19e0afd64ea77a4c018a4aef37e9ed',
+  'skia_revision': 'cb4eb612f02fb2e21dd8264fb573b73610c53f83',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.