dawn.node: Add TODOs for implementing unhandlederror.

Bug: dawn:1348
Change-Id: I3b3d10a1ff1828f602087f8b17610749c60b6e49
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/85801
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/dawn/node/binding/GPUDevice.cpp

@@ -494,11 +494,13 @@ namespace wgpu::binding {
     };
 
     interop::Interface<interop::EventHandler> GPUDevice::getOnuncapturederror(Napi::Env) {
+        // TODO(dawn:1348): Implement support for the "unhandlederror" event.
         UNIMPLEMENTED();
     }
 
     void GPUDevice::setOnuncapturederror(Napi::Env,
                                          interop::Interface<interop::EventHandler> value) {
+        // TODO(dawn:1348): Implement support for the "unhandlederror" event.
         UNIMPLEMENTED();
     }
 
@@ -507,6 +509,7 @@ namespace wgpu::binding {
         std::string type,
         std::optional<interop::Interface<interop::EventListener>> callback,
         std::optional<std::variant<interop::AddEventListenerOptions, bool>> options) {
+        // TODO(dawn:1348): Implement support for the "unhandlederror" event.
         UNIMPLEMENTED();
     }
 
@@ -515,10 +518,12 @@ namespace wgpu::binding {
         std::string type,
         std::optional<interop::Interface<interop::EventListener>> callback,
         std::optional<std::variant<interop::EventListenerOptions, bool>> options) {
+        // TODO(dawn:1348): Implement support for the "unhandlederror" event.
         UNIMPLEMENTED();
     }
 
     bool GPUDevice::dispatchEvent(Napi::Env, interop::Interface<interop::Event> event) {
+        // TODO(dawn:1348): Implement support for the "unhandlederror" event.
         UNIMPLEMENTED();
     }