Roll Dawn from 2c5b040b5c2a to f2bc3b3edd6f (3 revisions)

https://dawn.googlesource.com/dawn.git/+log/2c5b040b5c2a..f2bc3b3edd6f

2020-11-16 enga@chromium.org Print warning if errors occur and no error callback has been set
2020-11-16 cwallez@chromium.org Metal: Wrap NS classes and protocols in NSRef.
2020-11-16 enga@chromium.org Remove --skip-validation test flag from Dawn tests

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: If1b833528e879683bb77019c693892a54b2c8769
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2543200Reviewed-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@{#828082}

DEPS

@@ -324,7 +324,7 @@ 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': '2c5b040b5c2aa9482c7dc6a8dcbc730db21d5222',
+  'dawn_revision': 'f2bc3b3edd6f3a8424b230b17f844f59768d53b8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.