LibWeb: Make factory method of HTML::MessageChannel fallible

Author: https://github.com/kennethmyhra
Commit: 3d79cdf095
Pull-request: https://github.com/SerenityOS/serenity/pull/17491
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/HTML/MessageChannel.h

@@ -16,7 +16,7 @@ class MessageChannel final : public Bindings::PlatformObject {
     WEB_PLATFORM_OBJECT(MessageChannel, Bindings::PlatformObject);
 
 public:
-    static JS::NonnullGCPtr<MessageChannel> construct_impl(JS::Realm&);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<MessageChannel>> construct_impl(JS::Realm&);
     virtual ~MessageChannel() override;
 
     MessagePort* port1();