324   DST* after = NULL;  in ProbeDST()  local
333       if (after == NULL || after->end_sec > dst_[i].end_sec) {  in ProbeDST()
334         after = &dst_[i];  in ProbeDST()
342     before = InvalidSegment(before_) ? before_ : LeastRecentlyUsedDST(after);  in ProbeDST()
344   if (after == NULL) {  in ProbeDST()
345     after = InvalidSegment(after_) && before != after_  in ProbeDST()
350   DCHECK(after != NULL);  in ProbeDST()
351   DCHECK(before != after);  in ProbeDST()
353   DCHECK(InvalidSegment(after) || time_sec < after->start_sec);  in ProbeDST()
354   DCHECK(InvalidSegment(before) || InvalidSegment(after) ||  in ProbeDST()
355          before->end_sec < after->start_sec);  in ProbeDST()
358   after_ = after;  in ProbeDST()