LibWeb: Make factory method of HTML::ErrorEvent fallible

Userland/Libraries/LibWeb/HTML/ErrorEvent.cpp

@@ -9,12 +9,12 @@
 
 namespace Web::HTML {
 
-ErrorEvent* ErrorEvent::create(JS::Realm& realm, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<ErrorEvent>> ErrorEvent::create(JS::Realm& realm, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init)
 {
-    return realm.heap().allocate<ErrorEvent>(realm, realm, event_name, event_init).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<ErrorEvent>(realm, realm, event_name, event_init));
 }
 
-ErrorEvent* ErrorEvent::construct_impl(JS::Realm& realm, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<ErrorEvent>> ErrorEvent::construct_impl(JS::Realm& realm, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init)
 {
     return create(realm, event_name, event_init);
 }

Userland/Libraries/LibWeb/HTML/ErrorEvent.h

@@ -24,8 +24,8 @@ class ErrorEvent final : public DOM::Event {
     WEB_PLATFORM_OBJECT(ErrorEvent, DOM::Event);
 
 public:
-    static ErrorEvent* create(JS::Realm&, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init = {});
-    static ErrorEvent* construct_impl(JS::Realm&, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<ErrorEvent>> create(JS::Realm&, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init = {});
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<ErrorEvent>> construct_impl(JS::Realm&, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init);
 
     virtual ~ErrorEvent() override;