LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr

Author: https://github.com/mattco98
Commit: 7c0c1c8f49
Pull-request: https://github.com/SerenityOS/serenity/pull/17743
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/HTML/Scripting/Environments.h

@@ -130,7 +130,7 @@ private:
 
     // https://html.spec.whatwg.org/multipage/webappapis.html#outstanding-rejected-promises-weak-set
     // The outstanding rejected promises weak set must not create strong references to any of its members, and implementations are free to limit its size, e.g. by removing old entries from it when new ones are added.
-    Vector<JS::Promise*> m_outstanding_rejected_promises_weak_set;
+    Vector<JS::GCPtr<JS::Promise>> m_outstanding_rejected_promises_weak_set;
 
     // https://html.spec.whatwg.org/multipage/webappapis.html#about-to-be-notified-rejected-promises-list
     Vector<JS::Handle<JS::Promise>> m_about_to_be_notified_rejected_promises_list;