Wire up codec_delay() to MP3StreamParser and FFmpegAudioDecoder.

media/formats/mpeg/mpeg_audio_stream_parser_base.h

Index: media/formats/mpeg/mpeg_audio_stream_parser_base.h
diff --git a/media/formats/mpeg/mpeg_audio_stream_parser_base.h b/media/formats/mpeg/mpeg_audio_stream_parser_base.h
index 5975c1bdcee94f6937425a8ddb6a7fee7047a225..eb617e31f01c646f492939d238c6afba6be77603 100644
--- a/media/formats/mpeg/mpeg_audio_stream_parser_base.h
+++ b/media/formats/mpeg/mpeg_audio_stream_parser_base.h
@@ -23,7 +23,11 @@ class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
  public:
   // |start_code_mask| is used to find the start of each frame header.  Also
   // referred to as the sync code in the MP3 and ADTS header specifications.
-  MPEGAudioStreamParserBase(uint32 start_code_mask, AudioCodec audio_codec);
+  // |codec_delay_in_frames| is the number of silent samples the decoder will
+  // output before the first real frame.
+  MPEGAudioStreamParserBase(uint32 start_code_mask,
+                            AudioCodec audio_codec,
+                            int codec_delay_in_frames);
   virtual ~MPEGAudioStreamParserBase();
 
   // StreamParser implementation.
@@ -134,6 +138,7 @@ class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
   bool in_media_segment_;
   const uint32 start_code_mask_;
   const AudioCodec audio_codec_;
+  const int codec_delay_in_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(MPEGAudioStreamParserBase);
 };