Roll ANGLE from 736c43a1bb8f to 6eeb3d8bf667 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/736c43a1bb8f..6eeb3d8bf667

2020-09-01 geofflang@chromium.org Support DXT textures with non-block sized mip levels.
2020-09-01 geofflang@google.com Implement EXT_shadow_samplers
2020-09-01 jonahr@google.com Check for "Radeon" in renderer string.

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 cwallez@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: cwallez@google.com
Change-Id: I0dbeeb79a524ddc27a313339699038968ce821d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2388904Reviewed-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@{#803719}

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': '736c43a1bb8fd492274a7c1c1e944b9ef9698804',
+  'angle_revision': '6eeb3d8bf667e0f069f40580b2561372fdaca8c0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.