Roll DirectX Shader Compiler from 143da22bf733 to 4c8d21a0de9f (2 revisions)

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/143da22bf733..4c8d21a0de9f

2025-07-30 stevenperron@google.com [SPIRV] Handle member travrersal with template type (#7674)
2025-07-30 stevenperron@google.com [SPIRV] Handle partial template class specialization (#7673)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/directx-shader-compiler-dawn
Please CC lokokung@google.com,webgpu-developers@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in DirectX Shader Compiler: https://github.com/microsoft/DirectXShaderCompiler/issues/new/choose
To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: lokokung@google.com
Change-Id: I97ffdf55b2c0075fc07d6028c12f7db7b39f5a7d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/255320
Bot-Commit: 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 47494cb..743f355 100644
--- a/DEPS
+++ b/DEPS
@@ -341,7 +341,7 @@
   },
 
   'third_party/dxc': {
-    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@143da22bf733fcbb39a3e4659d5b77a43b226e71',
+    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@4c8d21a0de9f7a5074addb87fce0b0acb67f6450',
   },
 
   'third_party/dxheaders': {
diff --git a/third_party/dxc b/third_party/dxc
index 143da22..4c8d21a 160000
--- a/third_party/dxc
+++ b/third_party/dxc
@@ -1 +1 @@
-Subproject commit 143da22bf733fcbb39a3e4659d5b77a43b226e71
+Subproject commit 4c8d21a0de9f7a5074addb87fce0b0acb67f6450