Convert string16 to base::string16 in content.

content/browser/speech/speech_recognition_manager_impl.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 CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_MANAGER_IMPL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 57 matching lines @@
                                              int render_view_id) OVERRIDE;
   virtual void StopAudioCaptureForSession(int session_id) OVERRIDE;
   virtual const SpeechRecognitionSessionConfig& GetSessionConfig(
       int session_id) const OVERRIDE;
   virtual SpeechRecognitionSessionContext GetSessionContext(
       int session_id) const OVERRIDE;
   virtual int GetSession(int render_process_id,
                          int render_view_id,
                          int request_id) const OVERRIDE;
   virtual bool HasAudioInputDevices() OVERRIDE;
-  virtual string16 GetAudioInputDeviceModel() OVERRIDE;
+  virtual base::string16 GetAudioInputDeviceModel() OVERRIDE;
   virtual void ShowAudioInputSettings() OVERRIDE;
 
   // SpeechRecognitionEventListener methods.
   virtual void OnRecognitionStart(int session_id) OVERRIDE;
   virtual void OnAudioStart(int session_id) OVERRIDE;
   virtual void OnEnvironmentEstimationComplete(int session_id) OVERRIDE;
   virtual void OnSoundStart(int session_id) OVERRIDE;
   virtual void OnSoundEnd(int session_id) OVERRIDE;
   virtual void OnAudioEnd(int session_id) OVERRIDE;
   virtual void OnRecognitionEnd(int session_id) OVERRIDE;
@@ skipping 96 matching lines @@
 
   // Used for posting asynchronous tasks (on the IO thread) without worrying
   // about this class being destroyed in the meanwhile (due to browser shutdown)
   // since tasks pending on a destroyed WeakPtr are automatically discarded.
   base::WeakPtrFactory<SpeechRecognitionManagerImpl> weak_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_MANAGER_IMPL_H_