Add callback in VideoDecoder and AudioDecoder to return decoded frames.

media/filters/decrypting_video_decoder.h

Index: media/filters/decrypting_video_decoder.h
diff --git a/media/filters/decrypting_video_decoder.h b/media/filters/decrypting_video_decoder.h
index b06275c17a5d302919c3acf65bcd6683c2972237..263a30ace648a940af0cb6ee8fda16cc88ab464a 100644
--- a/media/filters/decrypting_video_decoder.h
+++ b/media/filters/decrypting_video_decoder.h
@@ -34,7 +34,8 @@ class MEDIA_EXPORT DecryptingVideoDecoder : public VideoDecoder {
   // VideoDecoder implementation.
   virtual void Initialize(const VideoDecoderConfig& config,
                           bool live_mode,
-                          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 void Reset(const base::Closure& closure) OVERRIDE;
@@ -84,6 +85,7 @@ class MEDIA_EXPORT DecryptingVideoDecoder : public VideoDecoder {
   State state_;
 
   PipelineStatusCB init_cb_;
+  OutputCB output_cb_;
   DecodeCB decode_cb_;
   base::Closure reset_cb_;