Call PersistentHandleVisitor directly instead of using ObjectVisitor.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index ae42da4ae6dbd09d300b2b4dcedd53455efc3ac2..43be499b3d88ff78ce7c5d16791a7dcac0ee5c03 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -8796,30 +8796,10 @@ bool Isolate::IsInUse() {
 }
 
 
-class VisitorAdapter : public i::ObjectVisitor {
- public:
-  explicit VisitorAdapter(PersistentHandleVisitor* visitor)
-      : visitor_(visitor) {}
-  void VisitPointers(i::Object** start, i::Object** end) override {
-    UNREACHABLE();
-  }
-  DISABLE_CFI_PERF
-  void VisitEmbedderReference(i::Object** p, uint16_t class_id) override {
-    Value* value = ToApi<Value>(i::Handle<i::Object>(p));
-    visitor_->VisitPersistentHandle(
-        reinterpret_cast<Persistent<Value>*>(&value), class_id);
-  }
-
- private:
-  PersistentHandleVisitor* visitor_;
-};
-
-
 void Isolate::VisitHandlesWithClassIds(PersistentHandleVisitor* visitor) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
   i::DisallowHeapAllocation no_allocation;
-  VisitorAdapter visitor_adapter(visitor);
-  isolate->global_handles()->IterateAllRootsWithClassIds(&visitor_adapter);
+  isolate->global_handles()->IterateAllRootsWithClassIds(visitor);
 }
 
 
@@ -8827,18 +8807,14 @@ void Isolate::VisitHandlesForPartialDependence(
     PersistentHandleVisitor* visitor) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
   i::DisallowHeapAllocation no_allocation;
-  VisitorAdapter visitor_adapter(visitor);
-  isolate->global_handles()->IterateAllRootsInNewSpaceWithClassIds(
-      &visitor_adapter);
+  isolate->global_handles()->IterateAllRootsInNewSpaceWithClassIds(visitor);
 }
 
 
 void Isolate::VisitWeakHandles(PersistentHandleVisitor* visitor) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
   i::DisallowHeapAllocation no_allocation;
-  VisitorAdapter visitor_adapter(visitor);
-  isolate->global_handles()->IterateWeakRootsInNewSpaceWithClassIds(
-      &visitor_adapter);
+  isolate->global_handles()->IterateWeakRootsInNewSpaceWithClassIds(visitor);
 }