Add a host parameter to ObjectVisitor methods.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 1dc15053cdf294c8e85571bb648680120e74d5a1..e63364279fcfbebdffc22fa9b4608923897129ac 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -2458,7 +2458,8 @@ class AlwaysAllocateScope {
 // objects in a heap space but above the allocation pointer.
 class VerifyPointersVisitor : public ObjectVisitor, public RootVisitor {
  public:
-  inline void VisitPointers(Object** start, Object** end) override;
+  inline void VisitPointers(HeapObject* host, Object** start,
+                            Object** end) override;
   inline void VisitRootPointers(Root root, Object** start,
                                 Object** end) override;