Roll src/third_party/angle 78a85f2c1856..f955fb455585 (8 commits)

https://chromium.googlesource.com/angle/angle.git/+log/78a85f2c1856..f955fb455585

git log 78a85f2c1856..f955fb455585 --date=short --first-parent --format='%ad %ae %s'
2020-03-19 jmadill@chromium.org Roll chromium_revision 86e00b5d..fa9d5805 (743688:750702)
2020-03-18 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-validation-layers/src 6cd8cbdaab99..caeb15a056a0 (15 commits)
2020-03-18 courtneygo@google.com Vulkan: Must call vkFlush while memory is mapped
2020-03-18 tobine@google.com Vulkan:Set one-time bit on all command buffers
2020-03-18 courtneygo@google.com Be sure to clear all program state at unlink
2020-03-18 jmadill@chromium.org Capture/Replay: Fix MEC Query capture.
2020-03-18 jmadill@chromium.org Capture/Replay: Fix compressed texture subImage caching.
2020-03-18 jmadill@chromium.org Capture/Replay: Use zlib to compress data files.

Created with:
  gclient setdep -r src/third_party/angle@f955fb455585

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 courtneygo@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: None
Tbr: courtneygo@google.com
Change-Id: Ia9a55781a150e7529a90ef09935f2b53900f478a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2109292Reviewed-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@{#751567}

DEPS

@@ -187,7 +187,7 @@ 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': '78a85f2c18569fb86a9a286f74272ccf56ffabae',
+  'angle_revision': 'f955fb4555855b49ef4ec59f890257526383cc01',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.