Implemented HEVC video demuxing and parsing

media/formats/mp4/box_definitions.h

Index: media/formats/mp4/box_definitions.h
diff --git a/media/formats/mp4/box_definitions.h b/media/formats/mp4/box_definitions.h
index 39a19b7fa0192376fe8377953f4a9c401c34387a..cdcd775fd0794df70516555ac5e7006876d06760 100644
--- a/media/formats/mp4/box_definitions.h
+++ b/media/formats/mp4/box_definitions.h
@@ -12,6 +12,7 @@
 #include "base/compiler_specific.h"
 #include "media/base/media_export.h"
 #include "media/base/media_log.h"
+#include "media/base/video_decoder_config.h"
 #include "media/formats/mp4/aac.h"
 #include "media/formats/mp4/avc.h"
 #include "media/formats/mp4/box_reader.h"
@@ -207,6 +208,9 @@ struct MEDIA_EXPORT VideoSampleEntry : Box {
   PixelAspectRatioBox pixel_aspect;
   ProtectionSchemeInfo sinf;
 
+  VideoCodec video_codec;
+  VideoCodecProfile video_codec_profile;
+
   bool IsFormatValid() const;
 
   scoped_refptr<BitstreamConverter> frame_bitstream_converter;