VerifyObject     1017 src/spaces.cc        VerifyObject(object);
VerifyObject     1566 src/spaces.h     virtual void VerifyObject(HeapObject* obj) {}
VerifyObject     2414 src/spaces.h     virtual void VerifyObject(HeapObject* obj);
VerifyObject     2452 src/spaces.h     virtual void VerifyObject(HeapObject* obj);