Roll Dawn from e8e089ad282e to 450b6f4f844d (3 revisions)

https://dawn.googlesource.com/dawn.git/+log/e8e089ad282e..450b6f4f844d

2020-07-17 cwallez@chromium.org Use MapAsync callback for server->client map callbacks.
2020-07-17 enga@chromium.org Vulkan: Fix MemoryServiceZirconHandle CreateImage
2020-07-17 enga@chromium.org D3D12: Bucket descriptor allocation by powers of two

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: I4c74fe221aaa09a2b25b43e54385b16e5c3cceb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2304367Reviewed-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@{#789415}

DEPS

@@ -322,7 +322,7 @@ 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': 'e8e089ad282e27d21c7bb426a73819d67266a3b3',
+  'dawn_revision': '450b6f4f844dab9417e54f08adf5b9d2ad30d1d7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.