Roll Tint from 8f9de8a509 to 31204afeb0 (3 revisions)

https://dawn.googlesource.com/tint.git/+log/8f9de8a50954..31204afeb025

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/tint-dawn
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

Bug: None
Tbr: sarahmashay@google.com
Change-Id: Ie35f47075c08fcdddf4318c79b5b85d1df838e57
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/49063
Reviewed-by: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -96,7 +96,7 @@ deps = {
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@8f9de8a509545aca7ac6b302c18fe7d0bf5a2e61',
+    'url': '{dawn_git}/tint@31204afeb0259873b5d777916cfae718cdb6fefd',
   },
 
   # GLFW for tests and samples