Roll ANGLE from 774cd1b212a4 to 98a51fde05e8 (4 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/774cd1b212a4..98a51fde05e8

2020-06-30 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SPIRV-Tools from 91c50e3fc993 to fc0dc3a9c734 (1 revision)
2020-06-30 xinghua.cao@intel.com Restrict member types for StructuredBuffer
2020-06-30 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-Tools from ff825d988fe8 to abc9dff824c3 (1 revision)
2020-06-30 angle-autoroll@skia-public.iam.gserviceaccount.com Roll glslang from 27e915ed4f20 to dca47063ccd2 (2 revisions)

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: I49a2e885ae083c6e23055ef3a84f350f9d85e660
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2275998Reviewed-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@{#783908}

DEPS

@@ -200,7 +200,7 @@ 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': '774cd1b212a47056b9cbfd7ffa83de8c0d25c4ac',
+  'angle_revision': '98a51fde05e84d714af995bb2f98ce629f79d161',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.