Introducing DemuxerHost::OnMetadata.

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 832caa32459ca84426793a883e5186726684812f..d27f0f9931c2e5dbedadc4bad65ee6927606ee3a 100644
--- a/media/filters/chunk_demuxer.cc
+++ b/media/filters/chunk_demuxer.cc
@@ -1021,6 +1021,26 @@ void ChunkDemuxer::ReportError_Locked(PipelineStatus error) {
   host_->OnDemuxerError(error);
 }
 
+void ChunkDemuxer::ReportMetadata_Locked() const {
+  DVLOG(1) << __func__;
+  lock_.AssertAcquired();
+  DCHECK_EQ(state_, INITIALIZED);
+
+  PipelineMetadata metadata;
+  metadata.timeline_offset = timeline_offset_;
+  if (video_) {
+    metadata.has_video = true;
+    metadata.natural_size = video_->video_decoder_config().natural_size();
+    metadata.video_rotation = video_->video_rotation();
+  }
+  if (audio_) {
+    metadata.has_audio = true;
+  }
+
+  base::AutoUnlock auto_unlock(lock_);
+  host_->OnMetadata(metadata);
+}
+
 bool ChunkDemuxer::IsSeekWaitingForData_Locked() const {
   lock_.AssertAcquired();
   for (MediaSourceStateMap::const_iterator itr = source_state_map_.begin();
@@ -1102,6 +1122,9 @@ void ChunkDemuxer::OnSourceInitDone(
   // The demuxer is now initialized after the |start_timestamp_| was set.
   ChangeState_Locked(INITIALIZED);
   base::ResetAndReturn(&init_cb_).Run(PIPELINE_OK);
+
+  // Report metadata.
+  ReportMetadata_Locked();
 }
 
 // static