Add default impl for DemuxerStream::EnableBitstreamConverter();

chromecast/media/cma/filters/demuxer_stream_adapter_unittest.cc

Index: chromecast/media/cma/filters/demuxer_stream_adapter_unittest.cc
diff --git a/chromecast/media/cma/filters/demuxer_stream_adapter_unittest.cc b/chromecast/media/cma/filters/demuxer_stream_adapter_unittest.cc
index a5661a48ce1f04ce99a62a42f7c0c86caa485997..4d8ba5420e214efd6ec661ba9818f0718caf2b85 100644
--- a/chromecast/media/cma/filters/demuxer_stream_adapter_unittest.cc
+++ b/chromecast/media/cma/filters/demuxer_stream_adapter_unittest.cc
@@ -48,7 +48,6 @@ class DummyDemuxerStream : public ::media::DemuxerStream {
   virtual ::media::AudioDecoderConfig audio_decoder_config() OVERRIDE;
   virtual ::media::VideoDecoderConfig video_decoder_config() OVERRIDE;
   virtual Type type() OVERRIDE;
-  virtual void EnableBitstreamConverter() OVERRIDE;
   virtual bool SupportsConfigChanges() OVERRIDE;
   virtual ::media::VideoRotation video_rotation() OVERRIDE;
 
@@ -123,9 +122,6 @@ void DummyDemuxerStream::Read(const ReadCB& read_cb) {
   return VIDEO;
 }
 
-void DummyDemuxerStream::EnableBitstreamConverter() {
-}
-
 bool DummyDemuxerStream::SupportsConfigChanges() {
   return true;
 }