ProcessWeakReferences 1300 src/heap.cc      ProcessWeakReferences(&weak_object_retainer);
ProcessWeakReferences 1466 src/heap.h       void ProcessWeakReferences(WeakObjectRetainer* retainer);
ProcessWeakReferences 2449 src/mark-compact.cc   heap()->ProcessWeakReferences(&mark_compact_object_retainer);
ProcessWeakReferences 3466 src/mark-compact.cc   heap()->ProcessWeakReferences(&evacuation_object_retainer);