Update media duration if data is appended after the previous duration

webkit/media/webmediaplayer_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.
 
 // Delegate calls from WebCore::MediaPlayerPrivate to Chrome's video player.
 // It contains Pipeline which is the actual media player pipeline, it glues
 // the media player pipeline, data source, audio renderer and renderer.
 // Pipeline would creates multiple threads and access some public methods
 // of this class, so we need to be extra careful about concurrent access of
 // methods and members.
@@ skipping 213 matching lines @@
   // |main_loop_| is being destroyed and we can stop posting repaint task
   // to it.
   virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
 
   void Repaint();
 
   void OnPipelineInitialize(media::PipelineStatus status);
   void OnPipelineSeek(media::PipelineStatus status);
   void OnPipelineEnded(media::PipelineStatus status);
   void OnPipelineError(media::PipelineStatus error);
+  void OnPipelineDurationChanged();
   void OnDemuxerOpened();
   void OnKeyAdded(const std::string& key_system, const std::string& session_id);
   void OnKeyError(const std::string& key_system,
                   const std::string& session_id,
                   media::Decryptor::KeyError error_code,
                   int system_code);
   void OnKeyMessage(const std::string& key_system,
                     const std::string& session_id,
                     scoped_array<uint8> message,
                     int message_length,
@@ skipping 102 matching lines @@
 
   // The decryptor that manages decryption keys and decrypts encrypted frames.
   ProxyDecryptor decryptor_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace webkit_media
 
 #endif  // WEBKIT_MEDIA_WEBMEDIAPLAYER_IMPL_H_