media: Use native DemuxerStream enum types in media mojo interfaces

media/base/stream_parser_buffer.cc

Index: media/base/stream_parser_buffer.cc
diff --git a/media/base/stream_parser_buffer.cc b/media/base/stream_parser_buffer.cc
index e06b566cea3f42b2d11710e5355751dfa942dd45..469a4a8dcaf0a91d7cf1e0bcba32d0ef58b36f67 100644
--- a/media/base/stream_parser_buffer.cc
+++ b/media/base/stream_parser_buffer.cc
@@ -135,9 +135,6 @@ const char* StreamParserBuffer::GetTypeName() const {
       return "text";
     case DemuxerStream::UNKNOWN:
       return "unknown";
-    case DemuxerStream::NUM_TYPES:
-      // Fall-through to NOTREACHED().
-      break;
   }
   NOTREACHED();
   return "";