Merge "MediaMetrics: fix error for compiler update." am: 039bbd44

                ++it) {

            if (ll <= 0) break;

            if (prefix != nullptr && !startsWith(it->first, prefix)) break;

            auto [s, l] = dumpMapTimeItem(it->second, ll - 1, sinceNs, prefix);

            std::tie(s, l) = dumpMapTimeItem(it->second, ll - 1, sinceNs, prefix);

            if (l == 0) continue; // don't show empty groups (due to sinceNs).

            ss << " " << it->first << "\n" << s;

            ll -= l + 1;