Revert "Roll src/third_party/angle bc82fb14aab4..c96187a919eb (1 commits)"

This reverts commit 0bc25688.

Reason for revert: Suspect of causing consistent failures of GPU tests on Chromium bot.
First failure: https://ci.chromium.org/p/chromium/builders/ci/Linux%20TSan%20Tests/47651

Original change's description:
> Roll src/third_party/angle bc82fb14aab4..c96187a919eb (1 commits)
> 
> https://chromium.googlesource.com/angle/angle.git/+log/bc82fb14aab4..c96187a919eb
> 
> git log bc82fb14aab4..c96187a919eb --date=short --first-parent --format='%ad %ae %s'
> 2019-11-29 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader d6e903bdc9ef..fb7ca1d5aca5 (13 commits)
> 
> Created with:
>   gclient setdep -r src/third_party/angle@c96187a919eb
> 
> 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/+/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_optional_gpu_tests_rel
> Bug: chromium:None
> Tbr: cwallez@google.com
> Change-Id: I59a363871bd6ed3b1fa3eee593c356f6b4b9e780
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1944051
> Reviewed-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@{#720145}

TBR=cwallez@google.com,chromium-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: I20c84205db53ca1a9b579d92c948989c37ab7e2c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:None
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_optional_gpu_tests_rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1943139Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720166}

DEPS

@@ -184,7 +184,7 @@ 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': 'c96187a919ebb773fa0a50965c8e7a99e1d893d0',
+  'angle_revision': 'bc82fb14aab4b1238cdb7291bdd34816863f26b8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.