Implementing preload=metadata for video

media/filters/ffmpeg_demuxer.cc

Index: media/filters/ffmpeg_demuxer.cc
diff --git a/media/filters/ffmpeg_demuxer.cc b/media/filters/ffmpeg_demuxer.cc
index 15df5427dba815ae86fdc2472f219733740135cb..b7d53bca73c88349b1d064ceb38f184a2dcdf465 100644
--- a/media/filters/ffmpeg_demuxer.cc
+++ b/media/filters/ffmpeg_demuxer.cc
@@ -301,6 +301,16 @@ void FFmpegDemuxer::Seek(base::TimeDelta time, FilterCallback* callback) {
       NewRunnableMethod(this, &FFmpegDemuxer::SeekTask, time, callback));
 }
 
+void FFmpegDemuxer::SetPlaybackRate(float playback_rate) {
+  DCHECK(data_source_.get());
+  data_source_->SetPlaybackRate(playback_rate);
+}
+
+void FFmpegDemuxer::SetPreload(Preload preload) {
+  DCHECK(data_source_.get());
+  data_source_->SetPreload(preload);
+}
+
 void FFmpegDemuxer::OnAudioRendererDisabled() {
   message_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(this, &FFmpegDemuxer::DisableAudioStreamTask));