Roll Dawn from f0a0c38623ed to 042184128efe (4 revisions)

https://dawn.googlesource.com/dawn.git/+log/f0a0c38623ed..042184128efe

2020-12-07 senorblanco@chromium.org Widen color state support on ES.
2020-12-07 enga@chromium.org Add SPIR-V support for UseTintGenerator toggle
2020-12-07 enga@chromium.org Produce tint::ast::Module in the frontend if UseTintGenerator
2020-12-07 brandon1.jones@intel.com Fix Emulated OOB Index In Primitive Restart Tests

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 rharrison@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: rharrison@google.com
Change-Id: I35154a6626c01839801cb083e143daa154df333a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2577582Reviewed-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@{#834388}

DEPS

@@ -326,7 +326,7 @@ 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': 'f0a0c38623ed7a523be9544e43c3f3c2a05cc267',
+  'dawn_revision': '042184128efea90552495d5054c3ae17b84cb3c3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.