Roll src/third_party/angle 1a41937a5321..81cee994e1d2 (3 commits)

https://chromium.googlesource.com/angle/angle.git/+log/1a41937a5321..81cee994e1d2

git log 1a41937a5321..81cee994e1d2 --date=short --first-parent --format='%ad %ae %s'
2020-03-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/glslang/src c6a4c6d3d8b5..aa95c80e1a89 (2 commits)
2020-03-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-tools/src 1af57a3ec414..94ed4c384c34 (1 commits)
2020-03-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader a095711c5d77..51b2800bb317 (1 commits)

Created with:
  gclient setdep -r src/third_party/angle@81cee994e1d2

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-chromium-autoroll
Please CC ianelliott@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_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win-asan;luci.chromium.try:win_optional_gpu_tests_rel
Bug: None
Tbr: ianelliott@google.com
Change-Id: Iecf542bbc960c4538e69d0f1dea687c58d79f3fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2091405Reviewed-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@{#747666}

DEPS

@@ -187,7 +187,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': '1a41937a53219ffd46cba86a606fb4f7d49f5a32',
+  'angle_revision': '81cee994e1d2c2b839d3b24439b9f95db01a328f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.