Roll Dawn from b2a4e87ad274 to ad421a248adb (2 revisions)

https://dawn.googlesource.com/dawn.git/+log/b2a4e87ad274..ad421a248adb

2020-09-29 enga@chromium.org Remove AMD test suppression in VulkanImageWrappingTests
2020-09-29 cwallez@chromium.org TextureFormatTests: Test more Snorm format corner cases.

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 cwallez@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: cwallez@google.com
Change-Id: I222d308dd4219f8ef93d2500c2740b675f48751e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2439378Reviewed-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@{#811974}

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': 'b2a4e87ad27403bcb0113406ba935477baae4a8c',
+  'dawn_revision': 'ad421a248adbe8cb71a147eae388c75afc4639bc',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.