Roll src/third_party/angle 956770025c8c..225110211231 (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/956770025c8c..225110211231

git log 956770025c8c..225110211231 --date=short --no-merges --format='%ad %ae %s'
2019-08-13 jmadill@chromium.org Vulkan: Remove unused GetDepthStencilAspectFlagsForCopy.
2019-08-13 jmadill@chromium.org Use TextureID in place of GLuint handles.

Created with:
  gclient setdep -r src/third_party/angle@225110211231

The AutoRoll server is located here: https://autoroll.skia.org/r/angle-chromium-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


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=syoussefi@chromium.org

Bug: chromium:992863
Change-Id: I564cf8a4be8fd7df819592350dc222979c359fea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1752042Reviewed-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@{#686574}

DEPS

@@ -157,7 +157,7 @@ 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': '956770025c8ca163847b5c21da596f07d024d1dd',
+  'angle_revision': '2251102112312a9762898ce785afce6adc4f5ca3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.