TBR: oncall: increase threshold for stale data.

PresubmitTest: none
Change-Id: I65dffe6de7dc1e18d0d82587f3b28c1eebd568fb
diff --git a/oncall/client/browser/components/status-table/index.js b/oncall/client/browser/components/status-table/index.js
index 43246f9..37b8d0f 100644
--- a/oncall/client/browser/components/status-table/index.js
+++ b/oncall/client/browser/components/status-table/index.js
@@ -195,7 +195,7 @@
         var tsLen = metricData.HistoryTimestamps.length;
         if (tsLen > 0) {
           var lastTimestamp = metricData.HistoryTimestamps[tsLen - 1];
-          if (data.MaxTime - lastTimestamp > 300) {
+          if (data.MaxTime - lastTimestamp > 600) {
             extraColMetricClass = '.stale';
           }
         } else {