[DevTools] Make toolbar counters declarative.

Source/devtools/front_end/components/InspectElementModeController.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:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 75 matching lines @@
     {
         if (!WebInspector.inspectElementModeController)
             return false;
         WebInspector.inspectElementModeController._toggleSearch();
         return true;
     }
 }
 
 /**
  * @constructor
- * @implements {WebInspector.StatusBarButton.Provider}
+ * @implements {WebInspector.StatusBarItem.Provider}
  */
 WebInspector.InspectElementModeController.ToggleButtonProvider = function()
 {
 }
 
 WebInspector.InspectElementModeController.ToggleButtonProvider.prototype = {
     /**
-     * @return {?WebInspector.StatusBarButton}
+     * @return {?WebInspector.StatusBarItem}
      */
-    button: function()
+    item: function()
     {
         if (!WebInspector.inspectElementModeController)
             return null;
 
         return WebInspector.inspectElementModeController._toggleSearchButton;
     }
 }
 
 /** @type {?WebInspector.InspectElementModeController} */
 WebInspector.inspectElementModeController = null;