Roll third_party/externals/angle2 e397949ec2db..14126505b237 (4 commits)

https://chromium.googlesource.com/angle/angle.git/+log/e397949ec2db..14126505b237


git log e397949ec2db..14126505b237 --date=short --no-merges --format='%ad %ae %s'
2019-03-06 jmadill@chromium.org Revert "Use a constexpr array for es3 copy conversion table."
2019-03-06 cwallez@chromium.org Revert "Allow enabling trace annotations"
2019-03-06 jmadill@chromium.org Disable non-conformant configs on official builds.
2019-03-06 syoussefi@chromium.org Vulkan: Decouple EGLSync from renderer serial


Created with:
  gclient setdep -r third_party/externals/angle2@14126505b237

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=reed@google.com

Change-Id: I175b5864d394e0b65abc8c9dc8c6c125d8987b67
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/198303
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>