TimelinePanel: do not collapse record when user changes panel.

Source/devtools/front_end/MemoryStatistics.js

 /*
  * Copyright (C) 2012 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 360 matching lines @@
     },
 
     refresh: function()
     {
         delete this._refreshTimer;
         this._timelineGrid.updateDividers(this._timelineView.calculator);
         this.draw();
         this._refreshCurrentValues();
     },
 
+    refreshRecords: function()
+    {
+    },
+
     /**
      * @param {number} originY
      * @param {number} height
      */
     _setVerticalClip: function(originY, height)
     {
         this._originY = originY;
         this._clippedHeight = height;
     },
 
     _clear: function()
     {
         var ctx = this._canvas.getContext("2d");
         ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
     },
 
     __proto__: WebInspector.SplitView.prototype
 }