DevTools: draw load/first paint marks as tall vertical delimiters

Source/devtools/front_end/timeline/TimelineFlameChart.js

Index: Source/devtools/front_end/timeline/TimelineFlameChart.js
diff --git a/Source/devtools/front_end/timeline/TimelineFlameChart.js b/Source/devtools/front_end/timeline/TimelineFlameChart.js
index 9a5a6170499ba276bf60792851ff67e8e30aadcd..2faa97c5c0c2a1c3bf81c68dba36c312932eadc9 100644
--- a/Source/devtools/front_end/timeline/TimelineFlameChart.js
+++ b/Source/devtools/front_end/timeline/TimelineFlameChart.js
@@ -156,6 +156,17 @@ WebInspector.TimelineFlameChartDataProvider.prototype = {
         return WebInspector.TracingTimelineUIUtils.eventTitle(event, this._model);
     },
 
+    /**
+     * @override
+     * @param {number} index
+     * @return {boolean}
+     */
+    isTallMarker: function(index)
+    {
+        var event = this._markerEvents[index];
+        return WebInspector.TracingTimelineUIUtils.isTallMarkerEvent(event);
+    },
+
     reset: function()
     {
         this._timelineData = null;