Roll src/third_party/dawn 2d10e954cec2..73ea1f11068a (4 commits)

https://dawn.googlesource.com/dawn.git/+log/2d10e954cec2..73ea1f11068a

git log 2d10e954cec2..73ea1f11068a --date=short --first-parent --format='%ad %ae %s'
2020-04-07 cwallez@chromium.org Simplify the device lifecycle.
2020-04-07 cwallez@chromium.org Fix Dawn's proxy groups to use public_deps instead of deps
2020-04-07 cwallez@chromium.org Fix a -Wstrict-prototypes
2020-04-07 cwallez@chromium.org Add a DeviceBase::Initialize that must be called by backends.

Created with:
  gclient setdep -r src/third_party/dawn@73ea1f11068a

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: chromium:1064305
Tbr: cwallez@google.com
Change-Id: Ie7a559ae1dfae4f5a22b5e2bcfe34ab2db9e6b1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2140512Reviewed-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@{#757178}

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': '2d10e954cec2a605345e0971c4cf7fc046a27ca8',
+  'dawn_revision': '73ea1f11068a3b85c7cd7cd12b856a681df4ce31',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.