DevTools: remove most convenience wrappers from WI.TimelineModel.Record

Source/devtools/front_end/timeline/TimelinePanel.js

Index: Source/devtools/front_end/timeline/TimelinePanel.js
diff --git a/Source/devtools/front_end/timeline/TimelinePanel.js b/Source/devtools/front_end/timeline/TimelinePanel.js
index 5af1b2adec7f520395de14a86eff052721ec8815..2bb950a15c57d699159182f8aaade0fee37e0c23 100644
--- a/Source/devtools/front_end/timeline/TimelinePanel.js
+++ b/Source/devtools/front_end/timeline/TimelinePanel.js
@@ -877,10 +877,11 @@ WebInspector.TimelinePanel.prototype = {
     {
         var markers = new Map();
         var recordTypes = WebInspector.TimelineModel.RecordType;
+        var zeroTime = this._model.minimumRecordTime();
         for (var record of this._model.eventDividerRecords()) {
             if (record.type() === recordTypes.TimeStamp || record.type() === recordTypes.ConsoleTime)
                 continue;
-            markers.set(record.startTime(), WebInspector.TimelineUIUtils.createDividerForRecord(record, 0));
+            markers.set(record.startTime(), WebInspector.TimelineUIUtils.createDividerForRecord(record, zeroTime, 0));
         }
         this._overviewPane.setMarkers(markers);
     },
@@ -1930,4 +1931,4 @@ WebInspector.TimelinePanel.RecordActionDelegate.prototype = {
         console.assert(panel && panel instanceof WebInspector.TimelinePanel);
         panel._toggleTimelineButtonClicked();
     }
-}
+}