Add live mode detection in WebM MediaSource parser.

media/filters/chunk_demuxer.h

Index: media/filters/chunk_demuxer.h
diff --git a/media/filters/chunk_demuxer.h b/media/filters/chunk_demuxer.h
index c0889f661cdabe89fead53f590ee7e8ce32ea9dc..3557c0c5bdf2da09a7da0944c9cace585bdc2057 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -159,6 +159,7 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   virtual DemuxerStream* GetStream(DemuxerStream::Type type) OVERRIDE;
   virtual base::TimeDelta GetStartTime() const OVERRIDE;
   virtual base::Time GetTimelineOffset() const OVERRIDE;
+  virtual bool IsLiveMode() const OVERRIDE;
 
   // Methods used by an external object to control this demuxer.
   //
@@ -287,8 +288,10 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   bool CanEndOfStream_Locked() const;
 
   // SourceState callbacks.
-  void OnSourceInitDone(bool success, base::TimeDelta duration,
-                        base::Time timeline_offset);
+  void OnSourceInitDone(bool success,
+                        base::TimeDelta duration,
+                        base::Time timeline_offset,
+                        bool live_mode);
 
   // Creates a DemuxerStream for the specified |type|.
   // Returns a new ChunkDemuxerStream instance if a stream of this type
@@ -366,6 +369,7 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   double user_specified_duration_;
 
   base::Time timeline_offset_;
+  bool live_mode_;
 
   typedef std::map<std::string, SourceState*> SourceStateMap;
   SourceStateMap source_state_map_;