Revert "Roll src/third_party/angle 93bb092f88c9..791ad7b8774a (2 commits)"

This reverts commit 1b50834a.

Reason for revert: need to revert this to revert 692365. #692365 causes compile failure on Linux CFI bot.

Sample build: https://ci.chromium.org/p/chromium/builders/ci/Linux%20CFI/14810

Sample log: https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8903575125463586160/+/steps/compile/0/stdout?format=raw

Original change's description:
> Roll src/third_party/angle 93bb092f88c9..791ad7b8774a (2 commits)
>
> https://chromium.googlesource.com/angle/angle.git/+log/93bb092f88c9..791ad7b8774a
>
> git log 93bb092f88c9..791ad7b8774a --date=short --no-merges --format='%ad %ae %s'
> 2019-08-31 syoussefi@chromium.org Vulkan: Enable more GLES3.1 dEQP tests
> 2019-08-31 syoussefi@chromium.org Vulkan: Storage image support
>
> Created with:
>   gclient setdep -r src/third_party/angle@791ad7b8774a
>
> 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 cwallez@chromium.org 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_optional_gpu_tests_rel
> TBR=cwallez@chromium.org
>
> Bug: None
> Change-Id: I224c7e2a76bc7eb8c5f9d59c4cfb0a95168fed80
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1779496
> Reviewed-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@{#692368}

TBR=cwallez@chromium.org,chromium-autoroll@skia-public.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: None
Change-Id: Id6e89cdcaa76b4463d3eb9046d41f9647df729c4
notry: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1780984Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Takashi Sakamoto <tasak@google.com>
Cr-Commit-Position: refs/heads/master@{#692394}

DEPS

@@ -174,7 +174,7 @@ 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': '791ad7b8774a06c996467eb9e6e5137b1e4ef452',
+  'angle_revision': '93bb092f88c982ef4c6d4e0db72afc5d7c178b42',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.