Roll third_party/externals/angle2 a9dfb3ba5db1..923c30fba116 (9 commits)
Roll third_party/externals/angle2 a9dfb3ba5db1..923c30fba116 (9 commits)

https://chromium.googlesource.com/angle/angle.git/+log/a9dfb3ba5db1..923c30fba116


git log a9dfb3ba5db1..923c30fba116 --date=short --no-merges --format='%ad %ae %s'
2019-06-27 jonahr@google.com Update test expectations for vulkan gles31 bots.
2019-06-27 syoussefi@chromium.org Vulkan: Emulate Transform Feedback with vertex shader output
2019-06-27 geofflang@chromium.org BlitGL: Support CL readback from non-renderable textures.
2019-06-27 ynovikov@chromium.org Fix skip Texture3DTestES3.DrawWithLevelsOutsideRangeWithInconsistentDimensions
2019-06-27 yunchao.he@intel.com Test RGB32F texture format on Intel Linux
2019-06-27 jmadill@chromium.org Vulkan: Remove flaky test suppression.
2019-06-27 jmadill@chromium.org Add std::ostream output for packed enums.
2019-06-27 timvp@google.com Support NaN conversion in Float32ToFloat16
2019-06-27 syoussefi@chromium.org Vulkan: Initial support for ES3.1


Created with:
  gclient setdep -r third_party/externals/angle2@923c30fba116

The AutoRoll server is located here: https://autoroll.skia.org/r/angle-skia-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=skia.primary:Build-Debian9-Clang-x86_64-Release-ANGLE;skia.primary:Perf-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE;skia.primary:Perf-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE;skia.primary:Perf-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE;skia.primary:Perf-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE;skia.primary:Perf-Win10-Clang-ShuttleC-GPU-GTX960-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-ShuttleC-GPU-GTX960-x86_64-Debug-All-ANGLE
TBR=djsollen@google.com

Change-Id: Ia1a346f983c7628e3deea3ba06f49cac305de179
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/224418
Reviewed-by: skia-autoroll <e034c62197df5622a9c1bef8b3e012f87a0a9840@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <e034c62197df5622a9c1bef8b3e012f87a0a9840@skia-public.iam.gserviceaccount.com>

HalCanary/skia-hc,HalCanary/skia-hc,google/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,google/skia,google/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia