Roll src/third_party/skia 1171d314efc7..4b55ff097b9d (2 commits)

https://skia.googlesource.com/skia.git/+log/1171d314efc7..4b55ff097b9d

git log 1171d314efc7..4b55ff097b9d --date=short --first-parent --format='%ad %ae %s'
2020-03-19 bsalomon@google.com Fix cmake angle build on linux.
2020-03-19 chinmaygarde@google.com Allows Skia users to disable use of API_AVAILABLE in the Metal backend.

Created with:
  gclient setdep -r src/third_party/skia@4b55ff097b9d

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 egdaniel@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
Bug: None
Tbr: egdaniel@google.com
Change-Id: Ifacffe0c7cc6560b563c318094ff6deba1c0d73e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2110586Reviewed-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@{#751869}

DEPS

@@ -175,7 +175,7 @@ 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': '1171d314efc7e131b039c94126d26575cfb9e70c',
+  'skia_revision': '4b55ff097b9d61ab9d4ebfbac2417996fb4fa5f0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.