Roll ANGLE from 9dac86c9c458 to 5b4c627389a6 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/9dac86c9c458..5b4c627389a6

2020-05-27 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-ValidationLayers from 6ff146b0bfce to 424cdd54fe80 (12 revisions)
2020-05-27 geofflang@chromium.org Don't allow glReadPixels of depth buffers with ES3.1.
2020-05-26 sunnyps@chromium.org Use surface texture offset for clears and blits

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 ynovikov@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: ynovikov@google.com
Change-Id: I5790febf21cb162059162fbf219852057a2c9dcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2217076Reviewed-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@{#772104}

DEPS

@@ -190,7 +190,7 @@ 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': '9dac86c9c4587cc8d5d6c4ac1630d50890bebbe0',
+  'angle_revision': '5b4c627389a6e71f0e70ff42a6d1d5003bbdb7b9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.