Oilpan: Remove a visitor parameter from isHeapObjectAlive

Source/platform/heap/ThreadState.h

Index: Source/platform/heap/ThreadState.h
diff --git a/Source/platform/heap/ThreadState.h b/Source/platform/heap/ThreadState.h
index 213170db701f44d52e20cb88735a751a38d74add..f39802b3fff2eb52239ab56d234d27a2e2f3a95b 100644
--- a/Source/platform/heap/ThreadState.h
+++ b/Source/platform/heap/ThreadState.h
@@ -116,10 +116,10 @@ using EphemeronCallback = VisitorCallback;
 // }
 #define USING_PRE_FINALIZER(Class, method)   \
     public: \
-        static bool invokePreFinalizer(void* object, Visitor& visitor)   \
+        static bool invokePreFinalizer(void* object)   \
         { \
             Class* self = reinterpret_cast<Class*>(object); \
-            if (visitor.isHeapObjectAlive(self)) \
+            if (Heap::isHeapObjectAlive(self))              \
                 return false; \
             self->method(); \
             return true; \
@@ -676,7 +676,7 @@ private:
     void cleanupPages();
 
     void unregisterPreFinalizerInternal(void*);
-    void invokePreFinalizers(Visitor&);
+    void invokePreFinalizers();
 
 #if ENABLE(GC_PROFILING)
     void snapshotFreeList();
@@ -727,7 +727,7 @@ private:
     GCState m_gcState;
 
     CallbackStack* m_threadLocalWeakCallbackStack;
-    HashMap<void*, bool (*)(void*, Visitor&)> m_preFinalizers;
+    HashMap<void*, bool (*)(void*)> m_preFinalizers;
 
     v8::Isolate* m_isolate;
     void (*m_traceDOMWrappers)(v8::Isolate*, Visitor*);