Roll Dawn from 321c900c6b16 to c74af7037817 (1 revision)

https://dawn.googlesource.com/dawn.git/+log/321c900c6b16..c74af7037817

2021-05-02 jiawei.shao@intel.com Implement CallbackTaskManager for Create*PipelineAsync

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 sarahmashay@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: sarahmashay@google.com
Change-Id: I304303d1f9913bb73c5a90a81a5f8698fed34ded
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2862620
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#878282}

DEPS

@@ -328,7 +328,7 @@ 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': '321c900c6b16bcc9268332d735b9b66fab161855',
+  'dawn_revision': 'c74af7037817b2b5324d2097ea0f277044424b19',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.