Roll ANGLE from fd7733e97423 to c47b951ecbcb (5 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/fd7733e97423..c47b951ecbcb

2020-12-15 paulthomson@google.com Capture: Disable GL_NV_shader_noperspective_interpolation
2020-12-15 jmadill@chromium.org Mac: Remove stderr output from lib preload.
2020-12-15 jmadill@chromium.org Introduce GN variables for Vulkan repos.
2020-12-15 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from 0c234289 to 5a03bdd6 (963 revisions)
2020-12-15 lehoangq@gmail.com Metal: Ignore OS's internal shader cache when testing.

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: I69a21dde299c3d674783e3f6cdf44dc542bd598f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2593437Reviewed-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@{#837174}

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': 'fd7733e974236d34b822c36becc965b8d3414f08',
+  '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.