165 bool File::IsValid() const {  in IsValid()  function in base::File
178   if (!IsValid())  in Close()
188   DCHECK(IsValid());  in Seek()
207   DCHECK(IsValid());  in Read()
229   DCHECK(IsValid());  in ReadAtCurrentPos()
250   DCHECK(IsValid());  in ReadNoBestEffort()
257   DCHECK(IsValid());  in ReadAtCurrentPosNoBestEffort()
271   DCHECK(IsValid());  in Write()
302   DCHECK(IsValid());  in WriteAtCurrentPos()
324   DCHECK(IsValid());  in WriteAtCurrentPosNoBestEffort()
333   DCHECK(IsValid());  in GetLength()
346   DCHECK(IsValid());  in SetLength()
354   DCHECK(IsValid());  in SetTimes()
366   DCHECK(IsValid());  in GetInfo()
391   if (!IsValid())  in Duplicate()
446   DCHECK(!IsValid());  in DoInitialize()
532   DCHECK(IsValid());  in Flush()