Track buffered byte ranges correctly in media::Pipeline.

media/tools/seek_tester/seek_tester.cc

Index: media/tools/seek_tester/seek_tester.cc
diff --git a/media/tools/seek_tester/seek_tester.cc b/media/tools/seek_tester/seek_tester.cc
index b14628cf270114897ffcefd530e96b12ddfa4721..901c1bdc737db639a30b5c0677a3fd4c45de5499 100644
--- a/media/tools/seek_tester/seek_tester.cc
+++ b/media/tools/seek_tester/seek_tester.cc
@@ -26,12 +26,11 @@ class DemuxerHostImpl : public media::DemuxerHost {
  public:
   // DataSourceHost implementation.
   virtual void SetTotalBytes(int64 total_bytes) OVERRIDE {}
-  virtual void SetBufferedBytes(int64 buffered_bytes) OVERRIDE {}
+  virtual void AddBufferedByteRange(int64 start, int64 end) OVERRIDE {}
   virtual void SetNetworkActivity(bool is_downloading_data) OVERRIDE {}
 
   // DemuxerHost implementation.
   virtual void SetDuration(base::TimeDelta duration) OVERRIDE {}
-  virtual void SetCurrentReadPosition(int64 offset) OVERRIDE {}
   virtual void OnDemuxerError(media::PipelineStatus error) OVERRIDE {}
 };