Revert of media config: expand is_encrypted to a struct.

chromecast/common/media/cma_param_traits.h

Index: chromecast/common/media/cma_param_traits.h
diff --git a/chromecast/common/media/cma_param_traits.h b/chromecast/common/media/cma_param_traits.h
index 879bbf155ac827a437450b34fccba81150bcf9e9..c8609a5af388817d510ddc781e1fbce427818a7e 100644
--- a/chromecast/common/media/cma_param_traits.h
+++ b/chromecast/common/media/cma_param_traits.h
@@ -10,7 +10,6 @@
 namespace media {
 class AudioDecoderConfig;
 class VideoDecoderConfig;
-class EncryptionScheme;
 }
 
 namespace IPC {
@@ -35,15 +34,6 @@
   static void Log(const param_type& p, std::string* l);
 };
 
-template <>
-struct ParamTraits<media::EncryptionScheme> {
-  typedef media::EncryptionScheme param_type;
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m, base::PickleIterator* iter,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
 }  // namespace IPC
 
 #endif  // CHROMECAST_COMMON_MEDIA_CMA_PARAM_TRAITS_H_