Roll src/third_party/angle bf4a734c7e6c..9120bcae6c53 (3 commits)

https://chromium.googlesource.com/angle/angle.git/+log/bf4a734c7e6c..9120bcae6c53

git log bf4a734c7e6c..9120bcae6c53 --date=short --first-parent --format='%ad %ae %s'
2020-03-31 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/glslang/src 344bd0889ac9..e157435c1e77 (3 commits)
2020-03-31 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-tools/src bec7b6e29260..d712a6b03b9e (4 commits)
2020-03-31 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader 1c29477aa06e..5cf1e9a31c90 (6 commits)

Created with:
  gclient setdep -r src/third_party/angle@9120bcae6c53

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 cwallez@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: cwallez@google.com
Change-Id: Id7e870dcbd2288621fae1c6066c1b254ee2246a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2129576Reviewed-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@{#754889}

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': 'bf4a734c7e6ca690f321e2aa7e10e3d37102b194',
+  'angle_revision': '9120bcae6c53cb8ef4572362ad2a9af8f483d27a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.