Roll src/third_party/angle bdb0f8a52414..d968972519ba (7 commits)

https://chromium.googlesource.com/angle/angle.git/+log/bdb0f8a52414..d968972519ba

git log bdb0f8a52414..d968972519ba --date=short --first-parent --format='%ad %ae %s'
2020-01-16 jonahr@google.com Suppress UniformsBenchmark perftest on Win/NVIDIA/Vulkan
2020-01-16 m.maiya@samsung.com EGL: Add support for EGL_EXT_pixel_format_float extension
2020-01-16 sugoi@google.com Blendable check
2020-01-16 jmadill@chromium.org Vulkan: Make ContextVk own ResourceUseList.
2020-01-16 jdarpinian@chromium.org Require DEBUG_TRACE to enable expensive state validation
2020-01-16 jdarpinian@chromium.org Remove literal tab characters from generate_parser_tools.py
2020-01-16 jmadill@chromium.org Vulkan: Add ResourceUseList helper.

Created with:
  gclient setdep -r src/third_party/angle@d968972519ba

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 jonahr@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/+/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
Bug: chromium:1041672
Tbr: jonahr@google.com
Change-Id: Ia0f06af0bc2907b9450fe060b331dc482a14eb20
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2006328Reviewed-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@{#732652}

DEPS

@@ -193,7 +193,7 @@ 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': 'bdb0f8a524147f183f84c6013860384fb12934a3',
+  'angle_revision': 'd968972519ba773684b66af48669f33c4dd53d35',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.