Roll src/third_party/angle 7f8b6e3fabbd..8c396a9cc4a8 (3 commits)

https://chromium.googlesource.com/angle/angle.git/+log/7f8b6e3fabbd..8c396a9cc4a8

git log 7f8b6e3fabbd..8c396a9cc4a8 --date=short --first-parent --format='%ad %ae %s'
2020-01-21 flibitijibibo@gmail.com Ignore vulkan-loader dependency for GGP
2020-01-21 syoussefi@chromium.org Vulkan: Cleanup device feature query and enabling
2020-01-21 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-loader/src 2d6f74c6d431..af8c7e040f93 (11 commits)

Created with:
  gclient setdep -r src/third_party/angle@8c396a9cc4a8

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 timvp@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: chromium:1002945
Tbr: timvp@google.com
Change-Id: I984bce5adbb35693bcdc2245ba5429322944a6c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2013901Reviewed-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@{#733882}

DEPS

@@ -193,7 +193,7 @@ 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': '7f8b6e3fabbd579065944112095ffb69a869316b',
+  'angle_revision': '8c396a9cc4a83eaf8828dac7f0a39ed30714c58a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.