Draw marker events on Timeline flame chart

Source/devtools/front_end/profiler/CPUProfileFlameChart.js

 /**
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 93 matching lines @@
 
     /**
      * @return {?WebInspector.FlameChart.TimelineData}
      */
     timelineData: function()
     {
         return this._timelineData || this._calculateTimelineData();
     },
 
     /**
+     * @param {number} index
+     * @return {string}
+     */
+    markerColor: function(index)
+    {
+        throw new Error("Unreachable.");
+    },
+
+    /**
+     * @param {number} index
+     * @return {string}
+     */
+    markerTitle: function(index)
+    {
+        throw new Error("Unreachable.");
+    },
+
+    /**
      * @return {?WebInspector.FlameChart.TimelineData}
      */
     _calculateTimelineData: function()
     {
         /**
          * @constructor
          * @param {number} depth
          * @param {number} duration
          * @param {number} startTime
          * @param {number} selfTime
@@ skipping 41 matching lines @@
             var entry = entries[i];
             entryNodes[i] = entry.node;
             entryLevels[i] = entry.depth;
             entryTotalTimes[i] = entry.duration;
             entryStartTimes[i] = entry.startTime;
             entrySelfTimes[i] = entry.selfTime;
         }
 
         this._maxStackDepth = maxDepth;
 
-        /** @type {!WebInspector.FlameChart.TimelineData} */
-        this._timelineData = {
-            entryLevels: entryLevels,
-            entryTotalTimes: entryTotalTimes,
-            entryStartTimes: entryStartTimes,
-        };
+        this._timelineData = new WebInspector.FlameChart.TimelineData(entryLevels, entryTotalTimes, entryStartTimes);
 
         /** @type {!Array.<!ProfilerAgent.CPUProfileNode>} */
         this._entryNodes = entryNodes;
         this._entrySelfTimes = entrySelfTimes;
 
         return this._timelineData;
     },
 
     /**
      * @param {number} ms
@@ skipping 450 matching lines @@
     {
         var ratio = window.devicePixelRatio;
         this._overviewCanvas.width = width * ratio;
         this._overviewCanvas.height = height * ratio;
         this._overviewCanvas.style.width = width + "px";
         this._overviewCanvas.style.height = height + "px";
     },
 
     __proto__: WebInspector.VBox.prototype
 }