Roll Tint from 7156d3e3140b to 4f79c8405028 (1 revision)

https://dawn.googlesource.com/tint.git/+log/7156d3e3140b..4f79c8405028

2020-10-20 dsinclair@chromium.org [spirv-writer] Deduplicate sampler and comparision_sampler.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/tint-chromium-autoroll
Please CC dsinclair@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: dsinclair@google.com
Change-Id: I0c34a524b9a2fc20525a051d174f3fa39ed47016
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2488587Reviewed-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@{#819189}

DEPS

@@ -368,7 +368,7 @@ vars = {
   'ukey2_revision': '0275885d8e6038c39b8a8ca55e75d1d4d1727f47',
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'tint_revision': '7156d3e3140b361c34503e518fa078bd0189981f',
+  'tint_revision': '4f79c84050287dab127ba5410e770889ed11cb05',
 
   # TODO(crbug.com/941824): The values below need to be kept in sync
   # between //DEPS and //buildtools/DEPS, so if you're updating one,