DevTools: Implement extension-based status bar buttons

Source/devtools/front_end/main/App.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  */
 WebInspector.App = function()
 {
 };
 
 WebInspector.App.prototype = {
     createRootView: function()
     {
     },
 
-    createGlobalStatusBarItems: function()
-    {
-    },
-
     presentUI: function()
     {
         WebInspector.inspectorView.showInitialPanel();
 
         WebInspector.overridesSupport.applyInitialOverrides();
         if (WebInspector.overridesSupport.hasActiveOverrides())
             WebInspector.inspectorView.showViewInDrawer("emulation", true);
-    },
-
-    appendInspectStatusBarItem: function()
-    {
-        if (WebInspector.inspectElementModeController)
-            WebInspector.inspectorView.appendToLeftToolbar(WebInspector.inspectElementModeController.toggleSearchButton.element);
-    },
-
-    appendSettingsStatusBarItem: function()
-    {
-        WebInspector.inspectorView.appendToRightToolbar(WebInspector.settingsController.statusBarItem);
     }
 };
 
 /**
  * @type {!WebInspector.App}
  */
 WebInspector.app;