Set error on unrecognized top-level BMFF boxes.

media/mp4/fourccs.h

Index: media/mp4/fourccs.h
diff --git a/media/mp4/fourccs.h b/media/mp4/fourccs.h
index 8092ddad77d5ebcc5ec00691dd9a6c5b4226f2d1..a986f34846fc2e5fd3f6dce2d0e37b383fe173ad 100644
--- a/media/mp4/fourccs.h
+++ b/media/mp4/fourccs.h
@@ -32,7 +32,9 @@ enum FourCC {
   FOURCC_MDAT = 0x6d646174,
   FOURCC_MDHD = 0x6d646864,
   FOURCC_MDIA = 0x6d646961,
+  FOURCC_MECO = 0x6d65636f,
   FOURCC_MEHD = 0x6d656864,
+  FOURCC_META = 0x6d657461,
   FOURCC_MFHD = 0x6d666864,
   FOURCC_MFRA = 0x6d667261,
   FOURCC_MINF = 0x6d696e66,
@@ -43,6 +45,8 @@ enum FourCC {
   FOURCC_MVEX = 0x6d766578,
   FOURCC_MVHD = 0x6d766864,
   FOURCC_PASP = 0x70617370,
+  FOURCC_PDIN = 0x7064696e,
+  FOURCC_PRFT = 0x70726674,
   FOURCC_PSSH = 0x70737368,
   FOURCC_SAIO = 0x7361696f,
   FOURCC_SAIZ = 0x7361697a,
@@ -54,6 +58,7 @@ enum FourCC {
   FOURCC_SKIP = 0x736b6970,
   FOURCC_SMHD = 0x736d6864,
   FOURCC_SOUN = 0x736f756e,
+  FOURCC_SSIX = 0x73736978,
   FOURCC_STBL = 0x7374626c,
   FOURCC_STCO = 0x7374636f,
   FOURCC_STSC = 0x73747363,
@@ -75,11 +80,6 @@ enum FourCC {
   FOURCC_VIDE = 0x76696465,
   FOURCC_VMHD = 0x766d6864,
   FOURCC_WIDE = 0x77696465,
-
-  // The following are used for testing
-  FOURCC_CHLD = 0x63686c64,
-  FOURCC_MPTY = 0x6d707479,
-  FOURCC_TEST = 0x74657374,
 };
 
 const inline std::string FourCCToString(FourCC fourcc) {