Revert of media config: expand is_encrypted to a struct.

chromecast/common/media/cma_param_traits.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMECAST_COMMON_MEDIA_CMA_PARAM_TRAITS_H_
 #define CHROMECAST_COMMON_MEDIA_CMA_PARAM_TRAITS_H_
 
 #include "ipc/ipc_message_utils.h"
 
 namespace media {
 class AudioDecoderConfig;
 class VideoDecoderConfig;
-class EncryptionScheme;
 }
 
 namespace IPC {
 
 template <>
 struct ParamTraits<media::AudioDecoderConfig> {
   typedef media::AudioDecoderConfig 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);
 };
 
 template <>
 struct ParamTraits<media::VideoDecoderConfig> {
   typedef media::VideoDecoderConfig 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);
 };
 
-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_