Roll ANGLE from 70f493d6e6ab to ff5f715e5c4a (2 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/70f493d6e6ab..ff5f715e5c4a

2021-01-22 stevenan@google.com Properly fail upon program binary version mismatch
2021-01-22 timvp@google.com Capture/Replay: Capture all indexed buffer bindings during MEC

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: Ide69ed962820cc01f2a979c29d47abec3b8f8681
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643246Reviewed-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@{#845962}

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': '70f493d6e6ab13cb372345af9aac58df0d5add69',
+  'angle_revision': 'ff5f715e5c4af1f2195da69c4b7bb03efa5a91f8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.