Roll src/third_party/dawn 52d0627d5607..421684f9438d (1 commits)

https://dawn.googlesource.com/dawn.git/+log/52d0627d5607..421684f9438d

git log 52d0627d5607..421684f9438d --date=short --first-parent --format='%ad %ae %s'
2020-03-11 jiawei.shao@intel.com Support Storage Textures as Valid Binding Types

Created with:
  gclient setdep -r src/third_party/dawn@421684f9438d

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/+/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: Iea6b9e75a37cf4a486e3270461bead2d8a38ed9d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2097523Reviewed-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@{#749034}

DEPS

@@ -302,7 +302,7 @@ 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': '52d0627d5607cf191485165fe515062c2a61ce81',
+  'dawn_revision': '421684f9438d2c847b1c6571055074272d15c089',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.