Roll ANGLE from 108b759ef91b to f6df8692023c (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/108b759ef91b..f6df8692023c

2020-12-10 jmadill@chromium.org Vulkan: Support XFB in non-Vertex stages.
2020-12-10 kaiyili@google.com Add an option to copy the artifact to vendor partition
2020-12-10 jmadill@chromium.org Increase internal max uniform blocks limit to 60.

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 syoussefi@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/+doc/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;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: syoussefi@google.com
Test: Test: run roll_aosp.sh --copy-to-vendor-partion, build the Android image
Change-Id: I5e8d8661db84048c39452fedc8181aff7885a9f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2585724Reviewed-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@{#835844}

DEPS

@@ -211,7 +211,7 @@ 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': '108b759ef91bd51e76e3d9ca025fc27e4067fea8',
+  'angle_revision': 'f6df8692023c49bded07622e064f6f0a991c0938',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.