Bug 1910206 - chore(webgpu): warn on use of deprecated GPUAdapter.requestAdapterInfo r=webgpu-reviewers,jgilbert

@jimb and I thought this would be an important signal for users while we wait to land D222065.

Differential Revision: https://phabricator.services.mozilla.com/D222336

dom/webgpu/Adapter.cpp

@@ -494,6 +494,13 @@ already_AddRefed<dom::Promise> Adapter::RequestDevice(
 
 already_AddRefed<dom::Promise> Adapter::RequestAdapterInfo(
     const dom::Sequence<nsString>& /*aUnmaskHints*/, ErrorResult& aRv) const {
+  dom::AutoJSAPI api;
+  if (api.Init(GetParentObject())) {
+    JS::WarnUTF8(api.cx(),
+                 "`GPUAdapter.requestAdapterInfo()` is deprecated. "
+                 "Please use `GPUAdapter.info` instead.");
+  }
+
   RefPtr<dom::Promise> promise = dom::Promise::Create(GetParentObject(), aRv);
   if (!promise) return nullptr;
 

testing/web-platform/mozilla/meta/webgpu/cts/webgpu/api/operation/adapter/info/cts.https.html.ini

@@ -1 +1,2 @@
 [cts.https.html?q=webgpu:api,operation,adapter,info:adapter_info:*]
+  [:]