Clear button doesn't clear everything in memory section.

Source/devtools/front_end/TimelineView.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 460 matching lines @@
         this._automaticallySizeWindow = true;
         this._mainThreadTasks = [];
         this._gpuTasks = [];
     },
 
     _onRecordsCleared: function()
     {
         this._resetView();
         this._windowFilter.reset();
         this._invalidateAndScheduleRefresh(true, true);
+        this._updateSelectionDetails();
     },
 
     /**
      * @return {!Array.<!Element>}
      */
     elementsToRestoreScrollPositionsFor: function()
     {
         return [this._containerElement];
     },
 
@@ skipping 1291 matching lines @@
      * @param {boolean} vertical
      */
     setVertical: function(vertical)
     {
         this._contentElement.enableStyleClass("hbox", !vertical);
         this._contentElement.enableStyleClass("vbox", vertical);
     },
 
     __proto__: WebInspector.View.prototype
 }