Roll src/third_party/angle 7fd3ad466b4d..6ebed5428e4e (1 commits)

https://chromium.googlesource.com/angle/angle.git/+log/7fd3ad466b4d..6ebed5428e4e

git log 7fd3ad466b4d..6ebed5428e4e --date=short --first-parent --format='%ad %ae %s'
2019-11-28 xiaoxuan.liu@arm.com Add arm64 to libpng build configuration.

Created with:
  gclient setdep -r src/third_party/angle@6ebed5428e4e

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-chromium-autoroll
Please CC cwallez@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: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Bug: None
Tbr: cwallez@google.com
Change-Id: Idc99cac1ffeb1d77b36ef6d03612b28b97904e11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1942527Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#719976}

DEPS

@@ -184,7 +184,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': '7fd3ad466b4def80115c28f473f7cd9a1b024f98',
+  'angle_revision': '6ebed5428e4ee334d0ffc33572ed5ec68dcd458e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.