Roll third_party/externals/angle2 6aca71d..6d653c0 (4 commits)

https://chromium.googlesource.com/angle/angle.git/+log/6aca71d7d705..6d653c02dd24

git log 6aca71d..6d653c0 --date=short --no-merges --format='%ad %ae %s'
2019-08-21 [email protected] Vulkan: Set empty buffer to xfb descriptor set as an initial buffer
2019-08-20 [email protected] Autogenerated kFunction* variables detected as mutable constants
2019-08-20 [email protected] Get rid of gl_ViewID_OVR for ESSL1
2019-08-20 [email protected] Separate dirty bit for attrib's binding VBO change

Created with:
  gclient setdep -r third_party/externals/angle2@6d653c02dd24

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: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
[email protected]
Change-Id: I330307a5d25a8bf6c5f99a668e9a7d774fc5232d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/236017
Reviewed-by: skia-autoroll <[email protected]>
Commit-Queue: skia-autoroll <[email protected]>

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@6aca71d7d7054feb0edc219671410d10c156dddf",
+  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@6d653c02dd24fa6d2ac9d33328e53da246eb98da",
   "third_party/externals/dawn"            : "https://dawn.googlesource.com/dawn.git@472bd1ec29d8d4e03404bf4b4e0233e4fc6031ce",
   "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",