Roll Dawn from 8d69298d9b29 to b6f4d53126d3 (2 revisions)

https://dawn.googlesource.com/dawn.git/+log/8d69298d9b29..b6f4d53126d3

2020-11-13 brandon1.jones@intel.com Only Increment Serials When Necessary On D3D12
2020-11-13 enga@chromium.org dawn_wire: Protect against large allocations in ChunkedCommandHandler

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 sarahmashay@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: chromium:1145204
Tbr: sarahmashay@google.com
Change-Id: I46a43ad37e3828214e3585d775c582b820687f29
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536832Reviewed-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@{#827186}

DEPS

@@ -324,7 +324,7 @@ 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': '8d69298d9b2938dcac52a08451b4f63fb61c31cb',
+  'dawn_revision': 'b6f4d53126d3f0ad522df5fc77da4ac919ea43f6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.