RemoveBlock(it);
    it = next;
  }
}

void RamFileBlockCache::RemoveBlock(BlockMap::iterator entry) {
  // This signals that the block is removed, and should not be inadvertently
  // reinserted into the cache in UpdateLRU.
  entry->second->timestamp = 0;
  lru_list_.erase(entry->second->lru_iterator);
  lra_list_.erase(entry->second->lra_iterator);
  cache_size_ -= entry->second->data.capacity();