Roll third_party/externals/angle2 4a80ba2..5335faa (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/4a80ba25e67b..5335faaece2a

git log 4a80ba2..5335faa --date=short --no-merges --format='%ad %ae %s'
2019-10-22 jonahr@google.com Robust validate_step_info in generate_stats.py
2019-10-21 courtneygo@google.com Treat Pixel 2 XL and Pixel 2 the same

Created with:
  gclient setdep -r third_party/externals/angle2@5335faaece2a

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-skia-autoroll
Please CC michaelludwig@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=skia.primary:Build-Debian9-Clang-x86_64-Release-ANGLE;skia.primary:Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-Golo-GPU-QuadroP400-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC8i5BEK-GPU-IntelIris655-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE
Bug: None
TBR=michaelludwig@google.com
Change-Id: Id231105dc0055599ffadd65ed03c23b09ba60e62
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/249936
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>

Author: skia-autoroll

DEPS

@@ -7,7 +7,7 @@ vars = {
 deps = {
   "buildtools"                            : "https://chromium.googlesource.com/chromium/buildtools.git@505de88083136eefd056e5ee4ca0f01fe9b33de8",
   "common"                                : "https://skia.googlesource.com/common.git@9737551d7a52c3db3262db5856e6bcd62c462b92",
-  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@4a80ba25e67b56bd32b90f9665c35129ca705217",
+  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@5335faaece2ad62af2176df1efb92884f5750c15",
   "third_party/externals/dawn"            : "https://dawn.googlesource.com/dawn.git@f104ec23bc569b5383b9d3df173beeef2b1ff128",
   "third_party/externals/dng_sdk"         : "https://android.googlesource.com/platform/external/dng_sdk.git@c8d0c9b1d16bfda56f15165d39e0ffa360a11123",
   "third_party/externals/egl-registry"    : "https://skia.googlesource.com/external/github.com/KhronosGroup/EGL-Registry@a0bca08de07c7d7651047bedc0b653cfaaa4f2ae",