Roll ANGLE from abe9657839a4 to 8670d6183a84 (2 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/abe9657839a4..8670d6183a84

2020-12-03 m.maiya@samsung.com Add support for GL_EXT_debug_label
2020-12-03 ianelliott@google.com Vulkan: Use VK_EXT_device_memory_report extension

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 ianelliott@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: ianelliott@google.com
Change-Id: I073411ada86fa3e022b742e6789085bd3cca474c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570523Reviewed-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@{#833189}

DEPS

@@ -215,7 +215,7 @@ 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': 'abe9657839a4366d23477eb2d30146dad041d23d',
+  'angle_revision': '8670d6183a8439622e5f4527e4971bafb1a9ffa7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.