Revert "Roll Dawn from df909306835a to b04a92f01be0 (1 revision)"

This reverts commit f13525f7.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 813940 as the
culprit for failures in the build cycles as shown on:
https://analysis.chromium.org/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtL2YxMzUyNWY3MzYzNzNmOGFhM2ZhNWQ1YzQxY2Y3ZTcxNTExYTc0MDIM

Sample Failed Build: https://ci.chromium.org/b/8867243040948303664

Sample Failed Step: compile

Original change's description:
> Roll Dawn from df909306835a to b04a92f01be0 (1 revision)
> 
> https://dawn.googlesource.com/dawn.git/+log/df909306835a..b04a92f01be0
> 
> 2020-10-05 enga@chromium.org Add a per-thread proc table using thread local storage
> 
> 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: I5b8a66c618951312fdc5d3ede4f0c861ef17cd30
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450581
> Reviewed-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@{#813940}


Change-Id: If43f8e52042eb5c6d31f7896ceeb6d56b6c00e1f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
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
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450792
Cr-Commit-Position: refs/heads/master@{#813963}

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': 'b04a92f01be0e7dc2faf91e0f6f974f990e8b2f2',
+  'dawn_revision': 'df909306835aaac8326dd6a06bac2efdca43ee01',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.