Update child rows hidden check in the anomalies table.

The single child row was hidden in the anomalies table.


Change-Id: I7668470ae9b235b95f46d4882234454c23d4ee7a
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/1022423
Reviewed-by: Eduardo Yap <eduardoyap@google.com>
Commit-Queue: Maggie Dong <jiaxindong@google.com>
diff --git a/perf/modules/anomalies-table-sk/anomalies-table-sk.ts b/perf/modules/anomalies-table-sk/anomalies-table-sk.ts
index edfa658..a194425 100644
--- a/perf/modules/anomalies-table-sk/anomalies-table-sk.ts
+++ b/perf/modules/anomalies-table-sk/anomalies-table-sk.ts
@@ -299,7 +299,8 @@
           data-delta="${anomalySortValues.delta}"
           class=${this.getRowClass(i + 1, anomalyGroup)}
           ?hidden=${
-            !anomalyGroup.expanded && !this.isParentRow && anomalyGroup.anomalies.length > 1
+            (!this.isParentRow && !anomalyGroup.expanded) ||
+            (anomalyGroup.anomalies.length > 1 && !anomalyGroup.expanded)
           }>
           <td>
           </td>