Add HE AAC support to ISO BMFF.

media/mp4/mp4_stream_parser.h

Index: media/mp4/mp4_stream_parser.h
diff --git a/media/mp4/mp4_stream_parser.h b/media/mp4/mp4_stream_parser.h
index 7d9be27eaed84949c0d8b913df367a8877bbc466..706aa65dfc69db50df0e40eba605125de1778add 100644
--- a/media/mp4/mp4_stream_parser.h
+++ b/media/mp4/mp4_stream_parser.h
@@ -11,6 +11,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 #include "media/base/stream_parser.h"
+#include "media/mp4/aac.h"
 #include "media/mp4/offset_byte_queue.h"
 #include "media/mp4/track_run_iterator.h"
 
@@ -85,8 +86,9 @@ class MEDIA_EXPORT MP4StreamParser : public StreamParser {
   uint32 audio_track_id_;
   uint32 video_track_id_;
 
-  // We keep this around to avoid having to go digging through the moov with
+  // We keep them around to avoid having to go digging through the moov with
   // every frame.
+  AAC aac_;
   uint8 size_of_nalu_length_;
 
   DISALLOW_COPY_AND_ASSIGN(MP4StreamParser);