Roll ANGLE from 34eb401ba547 to 68e60a92ae92 (2 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/34eb401ba547..68e60a92ae92

2020-06-30 timvp@google.com Vulkan: Don't store transformed SPIR-V
2020-06-30 jmadill@chromium.org Tests: Add scripts/common.py to standalone data.

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 ianelliott@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: ianelliott@google.com
Test: Test: CQ
Change-Id: I61408bdd41c080bb8f1f43e870cade6acfe946ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2276539Reviewed-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@{#784158}

DEPS

@@ -200,7 +200,7 @@ 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': '34eb401ba5479e412b6c1dc26f183c13f4caf168',
+  'angle_revision': '68e60a92ae925314c97bed32079acdf284c71eef',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.