// Implementation of DataSource. These methods may be called on any single
// thread. First usage of these methods attaches a thread checker.
- virtual void Stop(const base::Closure& callback) OVERRIDE;
+ virtual void Stop() OVERRIDE;
virtual void Read(int64 position, int size, uint8* data,
const ReadCB& read_cb) OVERRIDE;
virtual bool GetSize(int64* size_out) OVERRIDE;