Roll Dawn from 4171134daf9d to 6b4a4a85dfd7 (1 revision)

https://dawn.googlesource.com/dawn.git/+log/4171134daf9d..6b4a4a85dfd7

2020-10-07 kainino@chromium.org Fix EntryPointTests WGSL shaders for Tint roll

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dawn-chromium-autoroll
Please CC kainino@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:dawn-linux-x64-deps-rel;luci.chromium.try:dawn-mac-x64-deps-rel;luci.chromium.try:dawn-win10-x64-deps-rel;luci.chromium.try:dawn-win10-x86-deps-rel
Bug: None
Tbr: kainino@google.com
Change-Id: I2b7b80b7274b6f99b6105ddf822e5eaf22bceca3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2459890Reviewed-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@{#814976}

DEPS

@@ -318,7 +318,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'dawn_revision': '4171134daf9dbcef5652582fcd637312f8e5ac4a',
+  'dawn_revision': '6b4a4a85dfd778964c48f5cec939b7da160a5db1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.