Persist filter bar state.

Source/devtools/front_end/FilterBar.js

 /*
  * Copyright (C) 2013 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 38 matching lines @@
 }
 
 WebInspector.FilterBar.FilterBarState = {
     Inactive : "inactive",
     Active : "active",
     Shown : "shown"
 };
 
 WebInspector.FilterBar.prototype = {
     /**
+     * @param {string} name
+     */
+    setName: function(name)
+    {
+        this._stateSetting = WebInspector.settings.createSetting("filterBar-" + name + "-toggled", false);
+        this._setState(this._stateSetting.get());
+    },
+
+    /**
      * @return {!WebInspector.StatusBarButton}
      */
     filterButton: function()
     {
         return this._filterButton;
     },
 
     /**
      * @return {!Element}
      */
@@ skipping 47 matching lines @@
     _updateFilterButton: function()
     {
         this._filterButton.state = this._filterBarState();
     },
 
     /**
      * @param {?Event} event
      */
     _handleFilterButtonClick: function(event)
     {
-        this._filtersShown = !this._filtersShown;
+        this._setState(!this._filtersShown);
+    },
+
+    /**
+     * @param {boolean} filtersShown
+     */
+    _setState: function(filtersShown)
+    {
+        if (this._filtersShown === filtersShown)
+            return;
+
+        this._filtersShown = filtersShown;
+        if (this._stateSetting)
+            this._stateSetting.set(filtersShown);
+
         this._updateFilterButton();
         this.dispatchEventToListeners(WebInspector.FilterBar.Events.FiltersToggled, this._filtersShown);
         if (this._filtersShown) {
             for (var i = 0; i < this._filters.length; ++i) {
                 if (this._filters[i] instanceof WebInspector.TextFilterUI) {
                     var textFilterUI = /** @type {!WebInspector.TextFilterUI} */ (this._filters[i]);
                     textFilterUI.focus();
                 }
             }
         }
@@ skipping 597 matching lines @@
         var label = this._filterElement.createChild("label");
         var checkBorder = label.createChild("div", "checkbox-filter-checkbox");
         this._checkElement = checkBorder.createChild("div", "checkbox-filter-checkbox-check");
         this._filterElement.addEventListener("click", this._onClick.bind(this), false);
         var typeElement = label.createChild("span", "type");
         typeElement.textContent = title;
     },
 
     __proto__: WebInspector.Object.prototype
 }