Roll src/third_party/angle 9a334fdadf3f..16944ed21bc2 (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/9a334fdadf3f..16944ed21bc2

git log 9a334fdadf3f..16944ed21bc2 --date=short --no-merges --format='%ad %ae %s'
2019-10-16 jmadill@chromium.org Vulkan: Fix ASSERT that could be triggered on some swaps.
2019-10-16 mihu@microsoft.com Disabling multisampled_render_to_texture extension if renderer is ADRENO.

Created with:
  gclient setdep -r src/third_party/angle@16944ed21bc2

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 jmadill@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=jmadill@google.com

Bug: None
Change-Id: I9bfbaeaeb645c50787d7c325f03716eeb043202d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865697Reviewed-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@{#706687}

DEPS

@@ -179,7 +179,7 @@ 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': '9a334fdadf3f74db751a6593e01738f2e7b8caa4',
+  'angle_revision': '16944ed21bc21040f9dec282ef4b3508d1976ca9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.