Move Extension into extensions namespace

chrome/browser/speech/speech_input_extension_manager.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 CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_MANAGER_H_
 #define CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_MANAGER_H_
 #pragma once
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/speech_recognition_event_listener.h"
 
-class Extension;
 class Profile;
 class SpeechRecognitionTrayIconController;
 
 namespace content {
 class NotificationRegistrar;
 struct SpeechRecognitionError;
 struct SpeechRecognitionResult;
 class SpeechRecognizer;
 }
 
@@ skipping 168 matching lines @@
   // Used in the UI thread.
   scoped_ptr<content::NotificationRegistrar> registrar_;
   SpeechInputExtensionInterface* speech_interface_;
   scoped_refptr<SpeechRecognitionTrayIconController> notification_;
 
   // Used in the IO thread.
   scoped_refptr<content::SpeechRecognizer> recognizer_;
 };
 
 #endif  // CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_MANAGER_H_