Update media duration if data is appended after the previous duration

media/base/pipeline.h

Index: media/base/pipeline.h
diff --git a/media/base/pipeline.h b/media/base/pipeline.h
index ce028be1be6b3f1102d4e126f68eaefa8a559d85..e9fcb9c139b0723bfe382022c2dab2c98c0b5ee6 100644
--- a/media/base/pipeline.h
+++ b/media/base/pipeline.h
@@ -126,7 +126,8 @@ class MEDIA_EXPORT Pipeline
   void Start(scoped_ptr<FilterCollection> filter_collection,
              const PipelineStatusCB& ended_cb,
              const PipelineStatusCB& error_cb,
-             const PipelineStatusCB& start_cb);
+             const PipelineStatusCB& start_cb,
+             const base::Closure& new_duration_cb);
 
   // Asynchronously stops the pipeline and resets it to an uninitialized state.
   //
@@ -289,12 +290,12 @@ class MEDIA_EXPORT Pipeline
   // DataSourceHost (by way of DemuxerHost) implementation.
   virtual void SetTotalBytes(int64 total_bytes) OVERRIDE;
   virtual void AddBufferedByteRange(int64 start, int64 end) OVERRIDE;
-  virtual void AddBufferedTimeRange(base::TimeDelta start,
-                                    base::TimeDelta end) OVERRIDE;
 
   // DemuxerHost implementaion.
   virtual void SetDuration(base::TimeDelta duration) OVERRIDE;
   virtual void OnDemuxerError(PipelineStatus error) OVERRIDE;
+  virtual void AddBufferedTimeRange(base::TimeDelta start,
+                                    base::TimeDelta end) OVERRIDE;
 
   // Initiates teardown sequence in response to a runtime error.
   //
@@ -337,7 +338,8 @@ class MEDIA_EXPORT Pipeline
   void StartTask(scoped_ptr<FilterCollection> filter_collection,
                  const PipelineStatusCB& ended_cb,
                  const PipelineStatusCB& error_cb,
-                 const PipelineStatusCB& start_cb);
+                 const PipelineStatusCB& start_cb,
+                 const base::Closure& new_duration_cb);
 
   // InitializeTask() performs initialization in multiple passes. It is executed
   // as a result of calling Start() or InitializationComplete() that advances
@@ -535,6 +537,7 @@ class MEDIA_EXPORT Pipeline
   base::Closure stop_cb_;
   PipelineStatusCB ended_cb_;
   PipelineStatusCB error_cb_;
+  base::Closure new_duration_cb_;
 
   // Decoder reference used for signalling imminent shutdown.
   // This is a HACK necessary because WebMediaPlayerImpl::Destroy() holds the