Use Object::Wrap only with v8::Object::Wrappable*

Author: gahaas

src/cppgc_helpers-inl.h

@@ -15,7 +15,8 @@ void CppgcMixin::Wrap(T* ptr, Realm* realm, v8::Local<v8::Object> obj) {
   v8::Isolate* isolate = realm->isolate();
   ptr->traced_reference_ = v8::TracedReference<v8::Object>(isolate, obj);
   // Note that ptr must be of concrete type T in Wrap.
-  v8::Object::Wrap<v8::CppHeapPointerTag::kDefaultTag>(isolate, obj, ptr);
+  auto* wrappable = static_cast<v8::Object::Wrappable*>(ptr);
+  v8::Object::Wrap<v8::CppHeapPointerTag::kDefaultTag>(isolate, obj, wrappable);
   // Keep the layout consistent with BaseObjects.
   obj->SetAlignedPointerInInternalField(
       kEmbedderType, realm->isolate_data()->embedder_id_for_cppgc());

src/cppgc_helpers.h

@@ -155,7 +155,7 @@ class CppgcMixin : public cppgc::GarbageCollectedMixin, public MemoryRetainer {
  */
 #define CPPGC_MIXIN(Klass)                                                     \
   public /* NOLINT(whitespace/indent) */                                       \
-  cppgc::GarbageCollected<Klass>, public cppgc::NameProvider, public CppgcMixin
+  v8::Object::Wrappable, public CppgcMixin
 
 #endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS