Roll ANGLE from 09ac7d906427 to 51ff0d0509b6 (8 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/09ac7d906427..51ff0d0509b6

2020-10-16 jmadill@chromium.org Trace Tests: Add vsync-limited mode with a GPU timer.
2020-10-16 jmadill@chromium.org Perf Tests: Add offscreen mode.
2020-10-16 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-Loader from 14ad927e679a to 970c132746b1 (1 revision)
2020-10-16 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-Tools from 1abaced34b84 to ee0de094ddff (1 revision)
2020-10-16 jmadill@chromium.org Suppress Mac/AMD/GL dEQP failures with standalone mode.
2020-10-16 jmadill@chromium.org Remove flaky check in TimerQueriesTest.
2020-10-16 cnorthrop@google.com Capture/Replay: Fix GL_HALF_FLOAT_OES vertex attrib type name
2020-10-16 jmadill@chromium.org Suppress fragment out int tests on Intel/Mac/GL.

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 ynovikov@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: ynovikov@google.com
Test: Test: Free Fire MEC
Change-Id: I97b73eabe1b4ca84b1c7e5fef15ba05c21cdd245
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2481882Reviewed-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@{#818167}

DEPS

@@ -218,7 +218,7 @@ 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': '09ac7d90642708ec27c03de3707e0d1c8e9c2573',
+  'angle_revision': '51ff0d0509b6e1d214c9602ef19501cdd3f43641',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.