Android implementation of text-to-speech code for Web Speech Synthesis API

chrome/browser/speech/tts_message_filter.h

 // Copyright (c) 2013 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_TTS_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_
 
 #include "chrome/browser/speech/tts_controller.h"
 #include "chrome/common/tts_messages.h"
 #include "content/public/browser/browser_message_filter.h"
 
 class Profile;
 
 class TtsMessageFilter
     : public content::BrowserMessageFilter,
-      public UtteranceEventDelegate {
+      public UtteranceEventDelegate,
+      public VoicesChangedDelegate {
  public:
   TtsMessageFilter(int render_process_id, Profile* profile);
 
   // content::BrowserMessageFilter implementation.
   virtual void OverrideThreadForMessage(
       const IPC::Message& message,
       content::BrowserThread::ID* thread) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
+  virtual void OnChannelClosing() OVERRIDE;
 
   // UtteranceEventDelegate implementation.
   virtual void OnTtsEvent(Utterance* utterance,
                           TtsEventType event_type,
                           int char_index,
                           const std::string& error_message) OVERRIDE;
 
+  // VoicesChangedDelegate implementation.
+  virtual void OnVoicesChanged() OVERRIDE;
+
  private:
   virtual ~TtsMessageFilter();
 
   void OnInitializeVoiceList();
   void OnSpeak(const TtsUtteranceRequest& utterance);
   void OnPause();
   void OnResume();
   void OnCancel();
 
   int render_process_id_;
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(TtsMessageFilter);
 };
 
 #endif  // CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_