Roll ANGLE from d852ad24adc0 to 29271d0eece4 (2 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/d852ad24adc0..29271d0eece4

2020-08-17 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-ValidationLayers from 1980311465cf to c1db3b8e7960 (1 revision)
2020-08-17 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SPIRV-Tools from b4c4da3e7606 to b8de4f57e983 (4 revisions)

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 cnorthrop@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: cnorthrop@google.com
Change-Id: I7fc274e7f5e2dbb7708f276b3098bc26f15f2779
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2358394Reviewed-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@{#798603}

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': 'd852ad24adc0c62ecb520835c1a835a42d3495e2',
+  'angle_revision': '29271d0eece4f36edd74905acf9e1295d9f01f1e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.