if (downloaded_block) {
      absl::MutexLock l(&mu_);
      // Do not update state if the block is already to be evicted.
      if (block->timestamp != 0) {
        // Use capacity() instead of size() to account for all  memory
        // used by the cache.
        cache_size_ += block->data.capacity();
        // Put to beginning of LRA list.
        lra_list_.erase(block->lra_iterator);
        lra_list_.push_front(key);