Adds the speech recognition button to the app-list searchbox.

ui/app_list/app_list_view_delegate.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <vector>
 
 #include "base/callback_forward.h"
@@ skipping 97 matching lines @@
 
   // Open the settings UI.
   virtual void OpenSettings() = 0;
 
   // Open the help UI.
   virtual void OpenHelp() = 0;
 
   // Open the feedback UI.
   virtual void OpenFeedback() = 0;
 
+  // Invoked to toggle the status of speech recognition.
+  virtual void ToggleSpeechRecognition() = 0;
+
   // Shows the app list for the profile specified by |profile_path|.
   virtual void ShowForProfileByPath(const base::FilePath& profile_path) = 0;
 
   // Get the start page web contents. Owned by the AppListViewDelegate.
   virtual content::WebContents* GetStartPageContents() = 0;
 
   // Returns the list of users (for AppListMenu).
   virtual const Users& GetUsers() const = 0;
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_