AckHandle          64 sync/internal_api/public/base/ack_handle.cc AckHandle::~AckHandle() {
AckHandle          68 sync/notifier/mock_ack_handler.h                    AckHandle,
AckHandle          54 sync/notifier/sync_invalidation_listener_unittest.cc typedef std::set<AckHandle, AckHandleLessThan> AckHandleSet;