Roll src/third_party/skia b184e9654d26..2dad99092c8c (2 commits)

https://skia.googlesource.com/skia.git/+log/b184e9654d26..2dad99092c8c

git log b184e9654d26..2dad99092c8c --date=short --no-merges --format='%ad %ae %s'
2019-11-21 halcanary@google.com Replace third_party/gif: Preflight changes
2019-11-21 ethannicholas@google.com Revert "Fixed some GrSkSLFP limitations."

Created with:
  gclient setdep -r src/third_party/skia@2dad99092c8c

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 robertphillips@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=robertphillips@google.com

Bug: None
Change-Id: Ie7990d5000a6f992c9ec8e5c8bf55c0ff74acc04
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1928148Reviewed-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@{#717691}

DEPS

@@ -172,7 +172,7 @@ 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': 'b184e9654d267001703f230e136bcf44b0e2b39c',
+  'skia_revision': '2dad99092c8c444aea9a29aca1633d7b9297077e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.