media config: expand is_encrypted to a struct.

media/mojo/services/media_type_converters.h

Index: media/mojo/services/media_type_converters.h
diff --git a/media/mojo/services/media_type_converters.h b/media/mojo/services/media_type_converters.h
index 92450c8d6f38a18ec5d73e3f2dfdd2ea36f68db2..c13c4c99d75ea492757d697a57527c6df6b9c0cb 100644
--- a/media/mojo/services/media_type_converters.h
+++ b/media/mojo/services/media_type_converters.h
@@ -16,6 +16,7 @@ class AudioBuffer;
 class AudioDecoderConfig;
 class DecoderBuffer;
 class DecryptConfig;
+class EncryptionScheme;
 class VideoDecoderConfig;
 class VideoFrame;
 struct CdmConfig;
@@ -28,6 +29,19 @@ struct SubsampleEntry;
 namespace mojo {
 
 template <>
+struct TypeConverter<media::interfaces::EncryptionSchemePtr,
+                     media::EncryptionScheme> {
+  static media::interfaces::EncryptionSchemePtr Convert(
+      const media::EncryptionScheme& input);
+};
+template <>
+struct TypeConverter<media::EncryptionScheme,
+                     media::interfaces::EncryptionSchemePtr> {
+  static media::EncryptionScheme Convert(
+      const media::interfaces::EncryptionSchemePtr& input);
+};
+
+template <>
 struct TypeConverter<media::interfaces::SubsampleEntryPtr,
                      media::SubsampleEntry> {
   static media::interfaces::SubsampleEntryPtr Convert(