Add Tint public/common configs to dawn_unittests

Fixes a breakage compiling dawn_unittests in a Chromium checkout.
These tests have started testing passing public Tint structs like
tint::sem::BindingPoint to Dawn internals.

Bug: dawn:1480
Change-Id: I41a30abbf73384c86b966223f5f689bd3339ce06
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/95986
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Austin Eng <enga@chromium.org>
diff --git a/src/dawn/tests/BUILD.gn b/src/dawn/tests/BUILD.gn
index fcbb93b..6417d2a 100644
--- a/src/dawn/tests/BUILD.gn
+++ b/src/dawn/tests/BUILD.gn
@@ -205,6 +205,13 @@
   # Add internal dawn native config for internal unittests.
   configs = [ "${dawn_root}/src/dawn/native:internal" ]
 
+  # Add Tint public+common configs so <tint/tint.h> can be included to test
+  # the Dawn/Tint boundary.
+  configs += [
+    "${dawn_root}/src/tint:tint_public_config",
+    "${dawn_root}/src/tint:tint_common_config",
+  ]
+
   sources = get_target_outputs(":mock_webgpu_gen")
   sources += [
     "${dawn_root}/src/dawn/wire/client/ClientMemoryTransferService_mock.cpp",