Roll third_party/externals/angle2 ed6e230..6dee176 (11 commits)

https://chromium.googlesource.com/angle/angle.git/+log/ed6e230ec65e..6dee176c8d7d

git log ed6e230..6dee176 --date=short --no-merges --format='%ad %ae %s'
2019-10-17 tobine@google.com Vulkan:Roll vulkan layers and headers
2019-10-17 jmadill@chromium.org Add more test_utils functions.
2019-10-17 geofflang@chromium.org Fix compiler warning in NativeBufferImageSiblingAndroid.h.
2019-10-17 tobine@google.com Make invalid extension directive a CHROMEOS warning
2019-10-17 geofflang@chromium.org Fix building libpng on arm CPUs.
2019-10-17 lehoangq@gmail.com Report Metal as unavailable
2019-10-17 jmadill@chromium.org Vulkan: Move SwiftShader ICD json to root_out_dir.
2019-10-17 jmadill@chromium.org Fix broken GN "all_dependent_configs".
2019-10-17 shaobo.yan@intel.com Add "DIFF_LINES_OF_CONTEXT: 1" to fix format issue
2019-10-17 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader 9097eeb..6652f0b (11 commits)
2019-10-17 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/glslang/src 1ff0c181bb37..a959deb00750 (12 commits)

Created with:
  gclient setdep -r third_party/externals/angle2@6dee176c8d7d

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 csmartdalton@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=csmartdalton@google.com
Change-Id: I31cfd6244e31bcbbaea758f8c3f8d30e2a6155c6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/249363
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@ed6e230ec65e7fe4acff17a00eb85bc3c8459bb5",
+  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@6dee176c8d7d712a23d3841c26ff9e6738fdbe2b",
   "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",