Roll Tint from 89fb370b3029 to a6969c435943 (7 revisions)

https://dawn.googlesource.com/tint.git/+log/89fb370b3029..a6969c435943

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 enga@google.com on the revert to ensure that a human
is aware of the problem.

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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/main/autoroll/README.md

Bug: None
Tbr: enga@google.com
Change-Id: I9bc6bf14318b4766b0728ffb00a0d663a0c1b11e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/66540
Reviewed-by: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 756b5f1..26d9cba 100644
--- a/DEPS
+++ b/DEPS
@@ -97,7 +97,7 @@
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@89fb370b3029afda0eeae5bd899f47a5ccca3647',
+    'url': '{dawn_git}/tint@a6969c435943152d70021fe6a28e5c085cd123b4',
   },
 
   # GLFW for tests and samples