Roll ANGLE from c151f873e4ab to 6abd28db911a (2 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/c151f873e4ab..6abd28db911a

2020-11-19 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-ValidationLayers from 169d0c7f8a7b to ec5cd38a0ca6 (2 revisions)
2020-11-19 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from bb96f79d0e15 to 282aa417236a (5 revisions)

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 cnorthrop@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/+doc/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;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: cnorthrop@google.com
Change-Id: I16dc9b9cb05809c7739310ddb1a245caf858d088
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2549149Reviewed-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@{#829234}

DEPS

@@ -209,7 +209,7 @@ 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': 'c151f873e4ab63fd8f58dd20864e444abfe39395',
+  'angle_revision': '6abd28db911aedc483b9bb969696027f30a4fe4a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.