Roll ANGLE from 51a0e95d78eb to f42409e60211 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/51a0e95d78eb..f42409e60211

2020-12-04 jmadill@chromium.org Program: Allow non-fragment program input variables.
2020-12-04 courtneygo@google.com Ignore redundant Texture state changes
2020-12-04 jmadill@chromium.org Translator: Collect gl_in as a varying.

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 ianelliott@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: ianelliott@google.com
Change-Id: Ib9939311d85ca8e333c5af4e6a845f0ff3851972
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2575440Reviewed-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@{#833907}

DEPS

@@ -216,7 +216,7 @@ 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': '51a0e95d78eb22b1d87dfe7cb10a576690931986',
+  'angle_revision': 'f42409e60211e9952d01918834c0eace3aeb27fd',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.