Add callback in VideoDecoder and AudioDecoder to return decoded frames.

media/filters/decrypting_audio_decoder.h

Index: media/filters/decrypting_audio_decoder.h
diff --git a/media/filters/decrypting_audio_decoder.h b/media/filters/decrypting_audio_decoder.h
index 547aeb568a687ff085f70baeefcaedf22cd628ac..ce4e0abb7a5e4d3fbbbad233583cc2872552954b 100644
--- a/media/filters/decrypting_audio_decoder.h
+++ b/media/filters/decrypting_audio_decoder.h
@@ -44,10 +44,10 @@ class MEDIA_EXPORT DecryptingAudioDecoder : public AudioDecoder {
 
   // AudioDecoder implementation.
   virtual void Initialize(const AudioDecoderConfig& config,
-                          const PipelineStatusCB& status_cb) OVERRIDE;
+                          const PipelineStatusCB& status_cb,
+                          const OutputCB& output_cb) OVERRIDE;
   virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer,
                       const DecodeCB& decode_cb) OVERRIDE;
-  virtual scoped_refptr<AudioBuffer> GetDecodeOutput() OVERRIDE;
   virtual void Reset(const base::Closure& closure) OVERRIDE;
   virtual void Stop() OVERRIDE;
 
@@ -99,6 +99,7 @@ class MEDIA_EXPORT DecryptingAudioDecoder : public AudioDecoder {
   State state_;
 
   PipelineStatusCB init_cb_;
+  OutputCB output_cb_;
   DecodeCB decode_cb_;
   base::Closure reset_cb_;
   base::Closure stop_cb_;