Roll src/third_party/skia fb6a1abe4567..c594e6269813 (2 commits)

https://skia.googlesource.com/skia.git/+log/fb6a1abe4567..c594e6269813

git log fb6a1abe4567..c594e6269813 --date=short --no-merges --format='%ad %ae %s'
2019-10-15 egdaniel@google.com Plumb GrColorType through all ops/processors that sample textures.
2019-10-15 brianosman@google.com Add interactive demo to particle gallery

Created with:
  gclient setdep -r src/third_party/skia@c594e6269813

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-autoroll
Please CC csmartdalton@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

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=csmartdalton@google.com

Bug: None
Change-Id: Ia6c904246ab5898b0fd2c9f57948f0b0eb838a7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863566Reviewed-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@{#706138}

DEPS

@@ -167,7 +167,7 @@ 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': 'fb6a1abe45673659c603241569db9128fe5691d7',
+  'skia_revision': 'c594e62698138bb25baa5ac110e65b14b22dfbec',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.