Roll ANGLE from 08c4d09493bf to 55e855496d00 (7 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/08c4d09493bf..55e855496d00

2020-07-20 jmadill@chromium.org Lift warning from trace tests.
2020-07-20 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-ValidationLayers from 412b1b7dd18c to b1346703979e (3 revisions)
2020-07-20 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-Headers from 858b13a1220a to 83825d55c7d5 (1 revision)
2020-07-20 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from 0a8f44c514ce to ea6f21a052c9 (9 revisions)
2020-07-20 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-Tools from d093d9723b7c to 50e737c82347 (1 revision)
2020-07-20 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SPIRV-Tools from 680c77fa6c81 to 717e7877cac1 (6 revisions)
2020-07-20 angle-autoroll@skia-public.iam.gserviceaccount.com Roll glslang from f3cb1896971f to 9eef54b2513c (2 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 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
Change-Id: I2661ca1a5b7f53ed10bdc88ce842c8c34b9459c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2307486Reviewed-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@{#790021}

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': '08c4d09493bf22418d7eb75dd936ada79095e088',
+  'angle_revision': '55e855496d00284c2cc0b28313578fd91ccde12e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.