Roll Dawn from d020de450147 to af55c04e3628 (5 revisions)

https://dawn.googlesource.com/dawn.git/+log/d020de450147..af55c04e3628

2021-03-24 bclayton@google.com .vscode/tasks.json: Implement tasks for Windows
2021-03-24 bclayton@google.com .gitignore: Add Visual Studio config directory
2021-03-24 bclayton@google.com Add .vscode/tasks.json
2021-03-24 bclayton@google.com Port ComputeSharedMemoryTests to WGSL
2021-03-24 bclayton@google.com Port TextureViewTests to WGSL

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 bclayton@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: bclayton@google.com
Change-Id: Ibc4b4067207a51640373f9eef8b6ee0731dd4e92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2782570
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@{#866137}

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': 'd020de45014756b86d0ad3c3e0ddda474f4d8041',
+  'dawn_revision': 'af55c04e362818c69b91801d8a4101095522eda4',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.