Use isProgram method to detect Program events

Source/devtools/front_end/timeline/TimelinePresentationModel.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 70 matching lines @@
         this._rootRecord = new WebInspector.TimelinePresentationModel.RootRecord();
         /** @type {!Object.<string, !WebInspector.TimelinePresentationModel.Record>} */
         this._coalescingBuckets = {};
     },
 
     /**
      * @param {!WebInspector.TimelineModel.Record} record
      */
     addRecord: function(record)
     {
-        var records;
-        if (record.type() === WebInspector.TimelineModel.RecordType.Program)
-            records = record.children();
-        else
-            records = [record];
-
-        for (var i = 0; i < records.length; ++i)
-            this._innerAddRecord(this._rootRecord, records[i]);
+        if (record.isProgram()) {
+            var records = record.children();
+            for (var i = 0; i < records.length; ++i)
+                this._innerAddRecord(this._rootRecord, records[i]);
+        } else {
+            this._innerAddRecord(this._rootRecord, record);
+        }
     },
 
     /**
      * @param {!WebInspector.TimelinePresentationModel.Record} parentRecord
      * @param {!WebInspector.TimelineModel.Record} record
      */
     _innerAddRecord: function(parentRecord, record)
     {
         var coalescingBucket;
 
@@ skipping 490 matching lines @@
     /**
      * @return {boolean}
      */
     hasWarnings: function()
     {
         return false;
     },
 
     __proto__: WebInspector.TimelinePresentationModel.Record.prototype
 }