Roll ANGLE from 47e66f22759a to 77defeb04693 (5 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/47e66f22759a..77defeb04693

2020-10-28 jmadill@chromium.org Add the ability to re-trace existing traces.
2020-10-28 jmadill@chromium.org Fix unintialized data in VertexAttributeTest.
2020-10-28 cnorthrop@google.com FrameCapture: Handle glReadPixels with pack buffer
2020-10-28 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Vulkan-ValidationLayers from 03f6ffd1dc46 to 87b0951f8dba (12 revisions)
2020-10-28 jmadill@chromium.org Capture/Replay: Always base replays on frame "1".

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 geofflang@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: geofflang@google.com
Test: Test: Capture PUBG Mobile
Change-Id: Ifb7b08a49489585c5a5ad3c6a60b2df13dcbd2c2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2506255Reviewed-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@{#821898}

DEPS

@@ -218,7 +218,7 @@ 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': '47e66f22759ac1c2a331e52d9260362c3f502798',
+  'angle_revision': '77defeb04693452a4227da1c04e88cc72f690a64',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.