Roll ANGLE from 68a5baeb5ba0 to d59bccb5df72 (5 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/68a5baeb5ba0..d59bccb5df72

2020-09-24 cclao@google.com Vulkan: updateRenderPassDesc may lose color attachment data
2020-09-24 jmadill@chromium.org Skip PBO test on TSAN.
2020-09-24 courtneygo@google.com Vulkan: Add mutex around queueSubmit related data
2020-09-24 jmadill@chromium.org Revert "Pass #pragma optimize setting down to compilation."
2020-09-24 sdefresne@chromium.org Explicitly filter assignments to sources variable

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 syoussefi@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: chromium:1018739
Tbr: syoussefi@google.com
Test: Test:
Change-Id: I7d648d7e839a33400650efad3677ec784cf98a11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2430346Reviewed-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@{#810479}

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': '68a5baeb5ba08575c2a3a6e31a0bd8eb4b39d4de',
+  'angle_revision': 'd59bccb5df722d82e9cd90a0f4b9418a69b19c4e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.