Rebuild webgpu-cts when files are deleted

Bug: chromium:1371251
Change-Id: I4837df026bb49f5f9542fb61ae37c506f86f06ae
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104621
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>

third_party/gn/webgpu-cts/BUILD.gn

diff --git a/third_party/gn/webgpu-cts/BUILD.gn b/third_party/gn/webgpu-cts/BUILD.gn
index d8fbf3f..8cc8c4d 100644
--- a/third_party/gn/webgpu-cts/BUILD.gn
+++ b/third_party/gn/webgpu-cts/BUILD.gn
@@ -57,6 +57,10 @@
              "//third_party/node/node_modules/typescript/lib/tsc.js",
              "//third_party/node/node.py",
              "${dawn_root}/webgpu-cts/scripts/tsc_ignore_errors.py",
+
+             # If the only change is that a file is deleted, we still need to
+             # rebuild so that listing.js gets updated.
+             "ts_sources.txt",
            ] + ts_source_inputs
 
   outputs = js_outputs