Roll src/third_party/angle b307010280b7..a9f11bf14bce (5 commits)

https://chromium.googlesource.com/angle/angle.git/+log/b307010280b7..a9f11bf14bce

git log b307010280b7..a9f11bf14bce --date=short --no-merges --format='%ad %ae %s'
2019-10-23 jmadill@chromium.org GN: Separate out constructor/destructor warnings.
2019-10-23 lehoangq@gmail.com Move Vulkan GlslangWrapper code to a shared location.
2019-10-23 jmadill@chromium.org Vulkan: Roll validation layers.
2019-10-23 jmadill@chromium.org Vulkan: Fix sampler object lifetime.
2019-10-23 jie.a.chen@intel.com Remove forceNonZeroScissor workaround

Created with:
  gclient setdep -r src/third_party/angle@a9f11bf14bce

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_optional_gpu_tests_rel
TBR=jonahr@google.com

Bug: None
Change-Id: Idc38de741248dc64cd3e02a83594d04a9f6099c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1875372Reviewed-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@{#708570}

DEPS

@@ -183,7 +183,7 @@ 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': 'b307010280b7f8f14b24660976c2938d4166c06c',
+  'angle_revision': 'a9f11bf14bcebf84788914012da0c3525d4b5e94',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.