Revert "Roll ANGLE from c47b951ecbcb to f32fbb51e8a1 (4 revisions)"

This reverts commit 297828da.

Reason for revert: Suspected cause of crbug.com/1159427
Bug: 1159427

Original change's description:
> Roll ANGLE from c47b951ecbcb to f32fbb51e8a1 (4 revisions)
>
> https://chromium.googlesource.com/angle/angle.git/+log/c47b951ecbcb..f32fbb51e8a1
>
> 2020-12-15 m.maiya@samsung.com Add EXT_shader_framebuffer_fetch_non_coherent entry points
> 2020-12-15 m.maiya@samsung.com Vulkan: Add the tests for EXT_clip_cull_distance
> 2020-12-15 timvp@google.com Vulkan: flushCommandsAndEndRenderPass during glFenceSync()
> 2020-12-15 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from c16dc7107fd3 to fa44979d90aa (5 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 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: Ib3a7f645466a7bd9b9d3189dcfed4fb9ff763621
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2593591
> 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@{#837367}

TBR=cwallez@google.com,chromium-autoroll@skia-public.iam.gserviceaccount.com,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: Icb842f4f1d82cdd083eccfb46d7f5f10deca3b28
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 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-asan;luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2595587Reviewed-by: Sean Gilhuly <sgilhuly@chromium.org>
Commit-Queue: Sean Gilhuly <sgilhuly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837580}

DEPS

@@ -211,7 +211,7 @@ 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': 'e335cc65a7abfc2c93e11db5475326fd79523a06',
+  'angle_revision': 'c47b951ecbcbbba653db801bc7eb5f4fa5d72042',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.