34   ClockSnapshotVector& snapshots = clocks_[domain];  in SyncClocks()  local
35   if (!snapshots.empty()) {  in SyncClocks()
37     if (trace_time_ns <= snapshots.back().trace_time_ns) {  in SyncClocks()
42     if (clock_time_ns <= snapshots.back().clock_time_ns) {  in SyncClocks()
51       while (!snapshots.empty() &&  in SyncClocks()
52              snapshots.back().clock_time_ns >= clock_time_ns) {  in SyncClocks()
53         snapshots.pop_back();  in SyncClocks()
57   snapshots.emplace_back(ClockSnapshot{clock_time_ns, trace_time_ns});  in SyncClocks()
62   ClockSnapshotVector& snapshots = clocks_[domain];  in ToTraceTime()  local
63   if (snapshots.empty()) {  in ToTraceTime()
70   auto it = std::upper_bound(snapshots.begin(), snapshots.end(), clock_time_ns,  in ToTraceTime()
72   if (it != snapshots.begin())  in ToTraceTime()