Roll Dawn from 2a8ada795146 to 875091308b04 (3 revisions)

https://dawn.googlesource.com/dawn.git/+log/2a8ada795146..875091308b04

2020-10-16 enga@chromium.org Cleanup old/deprecated wire and native APIs
2020-10-16 cwallez@chromium.org Make wgpu::Extent3D default to {1, 1, 1}.
2020-10-16 cwallez@chromium.org Add wgpu::TextureComponentType::DepthComparison

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 enga@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: enga@google.com
Change-Id: If589aa087737e6699e78892f4d9cbb0d8d21de7d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2481054Reviewed-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@{#818120}

DEPS

@@ -329,7 +329,7 @@ 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': '2a8ada79514632d2b9a60bd570cc3fcbf02b18e8',
+  'dawn_revision': '875091308b04ba87e29c929ed707f27889c660ea',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.