Roll src/third_party/angle 7a58e5b713c3..bf6b8d4a16ae (3 commits)

https://chromium.googlesource.com/angle/angle.git/+log/7a58e5b713c3..bf6b8d4a16ae

git log 7a58e5b713c3..bf6b8d4a16ae --date=short --first-parent --format='%ad %ae %s'
2020-03-26 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-headers/src fb7f9c9bcd1d..0e78ffd1dcfc (1 commits)
2020-03-26 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-loader/src ff44f21a0178..acbf316040c3 (1 commits)
2020-03-26 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader 540bdf92531d..77090261dabc (10 commits)

Created with:
  gclient setdep -r src/third_party/angle@bf6b8d4a16ae

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 cnorthrop@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-asan;luci.chromium.try:win_optional_gpu_tests_rel
Bug: None
Tbr: cnorthrop@google.com
Change-Id: Ie715b41c9008e31c7da86e4c6b70eca172ec359b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2121958Reviewed-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@{#753605}

DEPS

@@ -187,7 +187,7 @@ 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': '7a58e5b713c349707dbb79e39da4c21449f613b0',
+  'angle_revision': 'bf6b8d4a16ae13243fee8718e98c8658f4fab218',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.