Roll Dawn from 9aed03dcb02f to b54c82ed3948 (2 revisions)

https://dawn.googlesource.com/dawn.git/+log/9aed03dcb02f..b54c82ed3948

2020-08-18 enga@chromium.org Support depth-only/stencil-only COPY_SRC on OpenGL
2020-08-18 cwallez@chromium.org Metal: Remove usage of MTLTextureUsagePixelFormatView

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: I23a46acee92ef6202695c3cf6a1dd18f9640b2e9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363305Reviewed-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@{#799420}

DEPS

@@ -318,7 +318,7 @@ 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': '9aed03dcb02f8e21387d571902380e0f13d549ab',
+  'dawn_revision': 'b54c82ed3948e6aad955607772402d55c2113e46',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.