Update media duration if data is appended after the previous duration

media/filters/chunk_demuxer.cc

Index: media/filters/chunk_demuxer.cc
diff --git a/media/filters/chunk_demuxer.cc b/media/filters/chunk_demuxer.cc
index db9ef8f93654f5c2d288221bf0ee325861c9dfa2..3b450437ecf2756218734cdc6601d48856207705 100644
--- a/media/filters/chunk_demuxer.cc
+++ b/media/filters/chunk_demuxer.cc
@@ -742,6 +742,14 @@ bool ChunkDemuxer::AppendData(const std::string& id,
     }
   }
 
+  if (ranges.size() > 0) {
+    base::TimeDelta last_timestamp_buffered = ranges.end(ranges.size() - 1);
+    if (last_timestamp_buffered > duration_) {
+      duration_ = last_timestamp_buffered;
+      host_->SetDuration(last_timestamp_buffered);
+    }
+  }
+
   for (size_t i = 0; i < ranges.size(); ++i)
     host_->AddBufferedTimeRange(ranges.start(i), ranges.end(i));
 
@@ -923,8 +931,6 @@ void ChunkDemuxer::OnStreamParserInitDone(bool success, TimeDelta duration) {
       (!source_id_video_.empty() && !video_))
     return;
 
-  host_->SetDuration(duration_);
-
   ChangeState_Locked(WAITING_FOR_START_TIME);
 }
 
@@ -1028,6 +1034,9 @@ void ChunkDemuxer::OnNewMediaSegment(const std::string& source_id,
     video_->Seek(start_time_);
   }
 
+  duration_ = std::max(duration_, start_time_);
+  host_->SetDuration(duration_);
+
   // The demuxer is now initialized after the |start_timestamp_| was set.
   ChangeState_Locked(INITIALIZED);
   base::ResetAndReturn(&init_cb_).Run(PIPELINE_OK);