Roll src/third_party/angle 52ef28dcfe09..fcef6dcb6ab2 (1 commits)

https://chromium.googlesource.com/angle/angle.git/+log/52ef28dcfe09..fcef6dcb6ab2

git log 52ef28dcfe09..fcef6dcb6ab2 --date=short --first-parent --format='%ad %ae %s'
2020-01-25 flibitijibibo@gmail.com For GGP builds, define __ggp__ manually.

Created with:
  gclient setdep -r src/third_party/angle@fcef6dcb6ab2

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: None
Tbr: timvp@google.com
Change-Id: I15f40ba0694d217a040356a10ca67ad3f2a663b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2021766Reviewed-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@{#735243}

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': '52ef28dcfe09b0acef2865977d38246405e257bf',
+  'angle_revision': 'fcef6dcb6ab246bc5a3519cf3e8ca281315a6e63',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.