Roll ANGLE from c360709829e1 to 15d5965d77c5 (5 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/c360709829e1..15d5965d77c5

2020-11-11 m.maiya@samsung.com Vulkan: Support VK_KHR_image_format_list for PbufferSurfaces
2020-11-11 timvp@google.com Suppress RenderbufferBlitFramebufferTest
2020-11-11 timvp@google.com Suppress VulkanPerformanceCounterTest::DepthStencilTextureClearAndLoad
2020-11-11 jmadill@chromium.org Improve stack backtraces on Linux.
2020-11-11 jmadill@chromium.org Vulkan: Enable async feature in end2end_tests.

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 timvp@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: timvp@google.com
Test: Test: MultisampledRenderToTextureES3Test.RenderbufferBlitFramebufferTestTest: Test: PbufferTest.ClearAndBindTexImageSrgb*VulkanTest: Test: VulkanPerformanceCounterTest.DepthStencilTextureClearAndLoad
Change-Id: Idc3ce9110dc5e309e43f85d0d7169878d62f2cba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2533536Reviewed-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@{#826553}

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': 'c360709829e16ddfbc97070219cdc414e5e59fb3',
+  'angle_revision': '15d5965d77c5a4c23fedb22dd35837312d39e563',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.