Roll Dawn from 1c25198384e7 to 6c3da3dc5b87 (1 revision)

https://dawn.googlesource.com/dawn.git/+log/1c25198384e7..6c3da3dc5b87

2020-10-11 cwallez@chromium.org Make SetViewport validation match upstream WebGPU.

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 kainino@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: kainino@google.com
Change-Id: Ib567ee0a9f8fe01b6f50d011be0bbb4f89b5e2af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2465204Reviewed-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@{#816015}

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': '1c25198384e7ecfebbd3ac84203d3b1d46a0e228',
+  'dawn_revision': '6c3da3dc5b875a9500770644e0966c9f731dae7f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.