Update media duration if data is appended after the previous duration

webkit/media/webmediaplayer_proxy.h

Index: webkit/media/webmediaplayer_proxy.h
diff --git a/webkit/media/webmediaplayer_proxy.h b/webkit/media/webmediaplayer_proxy.h
index dd5dc6fe6c44a3fcf750ddf1c674dd8d8f4e331c..e5cc92f7bc23676c2a72c39eba6f635e4ce5e107 100644
--- a/webkit/media/webmediaplayer_proxy.h
+++ b/webkit/media/webmediaplayer_proxy.h
@@ -87,6 +87,7 @@ class WebMediaPlayerProxy
   void PipelineSeekCallback(media::PipelineStatus status);
   void PipelineEndedCallback(media::PipelineStatus status);
   void PipelineErrorCallback(media::PipelineStatus error);
+  void PipelineDurationChangedCallback();
 
   // ChunkDemuxerClient implementation.
   virtual void DemuxerOpened(media::ChunkDemuxer* demuxer) OVERRIDE;
@@ -140,6 +141,9 @@ class WebMediaPlayerProxy
   // Notify |webmediaplayer_| that the media has ended.
   void PipelineEndedTask(media::PipelineStatus status);
 
+  // Notify |webmediaplayer_| that the media has a new duration.
+  void PipelineDurationChangedTask();
+
   // Notify |webmediaplayer_| that a pipeline error has occurred during
   // playback.
   void PipelineErrorTask(media::PipelineStatus error);