OPEN_HIT          507 net/disk_cache/blockfile/backend_impl.cc   stats_.OnEvent(Stats::OPEN_HIT);
OPEN_HIT          473 net/disk_cache/blockfile/backend_impl_v3.cc   stats_.OnEvent(Stats::OPEN_HIT);
OPEN_HIT          192 net/disk_cache/blockfile/stats.cc   return GetRatio(OPEN_HIT, OPEN_MISS);
OPEN_HIT          200 net/disk_cache/blockfile/stats.cc   SetCounter(OPEN_HIT, 0);