Roll third_party/externals/angle2/ 64ac5d9eb..be7f44fb5 (4 commits)

Roll third_party/externals/angle2/ 64ac5d9eb..be7f44fb5 (4 commits)

https://chromium.googlesource.com/angle/angle.git/+log/64ac5d9eb62e..be7f44fb5741

$ git log 64ac5d9eb..be7f44fb5 --date=short --no-merges --format='%ad %ae %s'
2018-05-21 jie.a.chen Vulkan: Use push constant for masked clear color
2018-05-17 jiawei.shao ES31: Implement EXT_geometry_shader framebuffer default layers on OpenGL
2018-05-21 tobine Roll fwd ANGLE chromium DEPs
2018-05-18 jgilbert Add `formatType` arg to computeSkipBytes.

Created with:
  roll-dep third_party/externals/angle2

The AutoRoll server is located here: https://angle-skia-roll.skia.org

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=allanmac@google.com

Change-Id: Iedeca631b97786477b4d27499e33c8cef6ee2abb
Reviewed-on: https://skia-review.googlesource.com/129702
Reviewed-by: <angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: <angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>