Roll src/third_party/dawn da722adec9a9..a5d54d70915b (2 commits)

https://dawn.googlesource.com/dawn.git/+log/da722adec9a9..a5d54d70915b

git log da722adec9a9..a5d54d70915b --date=short --first-parent --format='%ad %ae %s'
2020-05-16 yunchao.he@intel.com Add end2end tests for texture subresource
2020-05-15 enga@chromium.org Cleanup: Remove unnecessary TestSetUp overload

Created with:
  gclient setdep -r src/third_party/dawn@a5d54d70915b

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: I75a5e44eb3b6f79d30ea0e23af8080ab64771bbe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2205154Reviewed-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@{#769557}

DEPS

@@ -301,7 +301,7 @@ 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': 'da722adec9a914fd17519faebdd6c9f3934fb518',
+  'dawn_revision': 'a5d54d70915b0cfda8234094ecb284e1bb179530',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.