Roll src/third_party/skia dabe38f611af..f61ee1ecac14 (2 commits)

https://skia.googlesource.com/skia.git/+log/dabe38f611af..f61ee1ecac14

git log dabe38f611af..f61ee1ecac14 --date=short --first-parent --format='%ad %ae %s'
2020-04-13 johnstiles@google.com Fix assertion in ImGui::NewFrame if getBackbufferSurface returns null.
2020-04-13 robertphillips@google.com Expand PlotLocator into a class

Created with:
  gclient setdep -r src/third_party/skia@f61ee1ecac14

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
Bug: None
Tbr: kjlubick@google.com
Change-Id: I865b14edf5afbe21d09b87790ff87af576807f66
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2147615Reviewed-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@{#758522}

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': 'dabe38f611afe51d0df70729de52f527810b3b19',
+  'skia_revision': 'f61ee1ecac14dba70f6d6f40e2f78501c506e3b3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.