Roll ANGLE from 68c424fe4240 to 97813ea40eea (4 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/68c424fe4240..97813ea40eea

2020-09-18 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-Loader from 399f7fd741f7 to a148cdd49041 (1 revision)
2020-09-18 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-ValidationLayers from 46fc663a1cb3 to d6935becabad (6 revisions)
2020-09-18 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SPIRV-Tools from 34ef0c3fdc8e to 50ae4c5f4427 (3 revisions)
2020-09-18 angle-autoroll@skia-public.iam.gserviceaccount.com Roll VK-GL-CTS from b045bf7d3b6a to 6ccc0d9ba0ff (1 revision)

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 jmadill@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: jmadill@google.com
Change-Id: I5407ab46da1b7247acc87f959c5b363a5bca6b85
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2418362Reviewed-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@{#808356}

DEPS

@@ -207,7 +207,7 @@ 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': '68c424fe42405e8459aae786f4f57930f6af0ca8',
+  'angle_revision': '97813ea40eea7e1df389a4146d9c35715b731b25',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.