TimelineFlameChart: fix for exception in highlightTimeRange which happens when entryIndex is incorr…

Source/devtools/front_end/TimelineFlameChart.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 436 matching lines @@
     reset: function()
     {
         this._automaticallySizeWindow = true;
         this._dataProvider.reset();
         this._mainView.setWindowTimes(0, Infinity);
     },
 
     _onRecordingStarted: function()
     {
         this._automaticallySizeWindow = true;
+        this._mainView.reset();
     },
 
     /**
      * @param {!WebInspector.TimelineModel.Record} record
      */
     addRecord: function(record)
     {
         this._dataProvider.reset();
         if (this._automaticallySizeWindow) {
             var minimumRecordTime = this._model.minimumRecordTime();
@@ skipping 59 matching lines @@
      */
     _onEntrySelected: function(event)
     {
         var entryIndex = event.data;
         var record = this._dataProvider._records[entryIndex];
         this._delegate.selectRecord(record);
     },
 
     __proto__: WebInspector.VBox.prototype
 }