Persist filter bar state.

Source/devtools/front_end/TimelinePanel.js

 /*
  * Copyright (C) 2012 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 324 matching lines @@
 
         panelStatusBarElement.appendChild(WebInspector.SettingsUI.createSettingCheckbox(WebInspector.UIString("Capture stacks"),
                                           WebInspector.settings.timelineCaptureStacks, true, undefined,
                                           WebInspector.UIString("Capture JavaScript stack on every timeline event")));
 
         this._miscStatusBarItems = panelStatusBarElement.createChild("div", "status-bar-item");
 
         this._filtersContainer = this.element.createChild("div", "timeline-filters-header hidden");
         this._filtersContainer.appendChild(this._filterBar.filtersElement());
         this._filterBar.addEventListener(WebInspector.FilterBar.Events.FiltersToggled, this._onFiltersToggled, this);
+        this._filterBar.setName("timelinePanel");
     },
 
     /**
      * @return {!WebInspector.FilterBar}
      */
     _createFilterBar: function()
     {
         this._filterBar = new WebInspector.FilterBar();
         this._filters = {};
         this._filters._textFilterUI = new WebInspector.TextFilterUI();
@@ skipping 767 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return !this._hiddenRecords[record.type];
     },
 
     __proto__: WebInspector.TimelineModel.Filter.prototype
 }