Roll src/third_party/angle 8b73596fe704..959d077f605e (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/8b73596fe704..959d077f605e

git log 8b73596fe704..959d077f605e --date=short --first-parent --format='%ad %ae %s'
2020-02-24 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-tools/src 16cf5591e399..a553ed74b7fe (3 commits)
2020-02-24 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/glslang/src c12493ff69e2..07e1a0a67aee (1 commits)

Created with:
  gclient setdep -r src/third_party/angle@959d077f605e

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 geofflang@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: geofflang@google.com
Change-Id: I0d3d0fbc6a4618f3cce857188ac95289b761c510
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2070081Reviewed-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@{#743906}

DEPS

@@ -183,7 +183,7 @@ 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': '8b73596fe7046921a5c145db16ff68ede6b71133',
+  'angle_revision': '959d077f605ee90652362033240188223f5c2816',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.