Roll src/third_party/angle f764fc02e94c..ec816af6e720 (4 commits)

https://chromium.googlesource.com/angle/angle.git/+log/f764fc02e94c..ec816af6e720

git log f764fc02e94c..ec816af6e720 --date=short --first-parent --format='%ad %ae %s'
2020-02-05 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-loader/src 807f14657a25..b932cf53f769 (3 commits)
2020-02-05 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader 41a7302e9c62..8e8e1d0dd729 (4 commits)
2020-02-05 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-validation-layers/src e85fe4c3cc9f..ab47cacfd3b3 (1 commits)
2020-02-05 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/spirv-tools/src 7a2d408dea60..9e52bc0d0c1d (11 commits)

Created with:
  gclient setdep -r src/third_party/angle@ec816af6e720

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: I0cffa53427ea5e34685d21ff858636ce71a54b55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2038178Reviewed-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@{#738515}

DEPS

@@ -188,7 +188,7 @@ 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': 'f764fc02e94c620b19beb761c610972f1d254591',
+  'angle_revision': 'ec816af6e720e254aa8cca441fa4e2fa9c4d100a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.