test: add dawnToggles tests and fix Dawn API naming

- Device.spec.ts に dawnToggles オプションのテストを追加
  (enable/disable/両方/空のケースをカバー)
- GPUAdapter.cpp の Dawn API 命名修正
  enabledTogglesCount → enabledToggleCount
  disabledTogglesCount → disabledToggleCount

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: halby24

packages/webgpu/cpp/rnwgpu/api/GPUAdapter.cpp

@@ -110,12 +110,12 @@ async::AsyncTaskHandle GPUAdapter::requestDevice(
           if (td.enable.has_value() && !td.enable->empty()) {
             for (const auto &s : *td.enable) enablePtrs.push_back(s.c_str());
             togglesDesc.enabledToggles = enablePtrs.data();
-            togglesDesc.enabledTogglesCount = enablePtrs.size();
+            togglesDesc.enabledToggleCount = enablePtrs.size();
           }
           if (td.disable.has_value() && !td.disable->empty()) {
             for (const auto &s : *td.disable) disablePtrs.push_back(s.c_str());
             togglesDesc.disabledToggles = disablePtrs.data();
-            togglesDesc.disabledTogglesCount = disablePtrs.size();
+            togglesDesc.disabledToggleCount = disablePtrs.size();
           }
           if (!enablePtrs.empty() || !disablePtrs.empty()) {
             togglesDesc.nextInChain = localDescriptor.nextInChain;

packages/webgpu/src/__tests__/Device.spec.ts

@@ -191,6 +191,61 @@ describe("Device", () => {
     expect(result).toBe(true);
   });
 
+  describe("dawnToggles", () => {
+    it("should request device with enable toggles", async () => {
+      const result = await client.eval(({ gpu }) =>
+        gpu.requestAdapter().then((adapter) =>
+          adapter!
+            .requestDevice({
+              dawnToggles: { enable: ["use_user_defined_labels_in_backend"] },
+            })
+            .then((device) => device !== null),
+        ),
+      );
+      expect(result).toBe(true);
+    });
+
+    it("should request device with disable toggles", async () => {
+      const result = await client.eval(({ gpu }) =>
+        gpu.requestAdapter().then((adapter) =>
+          adapter!
+            .requestDevice({
+              dawnToggles: { disable: ["use_user_defined_labels_in_backend"] },
+            })
+            .then((device) => device !== null),
+        ),
+      );
+      expect(result).toBe(true);
+    });
+
+    it("should request device with both enable and disable toggles", async () => {
+      const result = await client.eval(({ gpu }) =>
+        gpu.requestAdapter().then((adapter) =>
+          adapter!
+            .requestDevice({
+              dawnToggles: {
+                enable: ["use_user_defined_labels_in_backend"],
+                disable: ["disable_symbol_renaming"],
+              },
+            })
+            .then((device) => device !== null),
+        ),
+      );
+      expect(result).toBe(true);
+    });
+
+    it("should request device with empty dawnToggles", async () => {
+      const result = await client.eval(({ gpu }) =>
+        gpu.requestAdapter().then((adapter) =>
+          adapter!
+            .requestDevice({ dawnToggles: {} })
+            .then((device) => device !== null),
+        ),
+      );
+      expect(result).toBe(true);
+    });
+  });
+
   it("should receive uncapturederror event when validation error occurs", async () => {
     const result = await client.eval(({ gpu }) =>
       gpu.requestAdapter().then((adapter) =>