Roll src/third_party/skia 27c4369651a8..8c6c8b0c42e2 (6 commits)

https://skia.googlesource.com/skia.git/+log/27c4369651a8..8c6c8b0c42e2

git log 27c4369651a8..8c6c8b0c42e2 --date=short --no-merges --format='%ad %ae %s'
2019-10-11 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-10-11 halcanary@google.com docs/fiddle: add "incomplete" fiddle.
2019-10-11 halcanary@google.com SkPDF/tests: add regression test for crbug/494913
2019-10-11 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-10-11 egdaniel@google.com Remove GrPixelConfig version of CompressedDataSize.
2019-10-11 halcanary@google.com Docs: Update docs to point at named fiddles

Created with:
  gclient setdep -r src/third_party/skia@8c6c8b0c42e2

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 kjlubick@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=kjlubick@google.com

Bug: chromium:494913
Change-Id: I40b8e8a73836d46931cea02ebd773acebb722c69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1856955Reviewed-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@{#705307}

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': '27c4369651a868d6d0dcf367456efc39eeaf2c98',
+  'skia_revision': '8c6c8b0c42e2e3d92d596bc950aedfecdd814d5d',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.