media config: expand is_encrypted to a struct.

media/filters/decrypting_demuxer_stream.cc

Index: media/filters/decrypting_demuxer_stream.cc
diff --git a/media/filters/decrypting_demuxer_stream.cc b/media/filters/decrypting_demuxer_stream.cc
index 637de2afd433ab9a6055a7ec3973dd866ff7de5b..1719170bdf91e95bb378ddfb3e1f5dc6a26a8cd7 100644
--- a/media/filters/decrypting_demuxer_stream.cc
+++ b/media/filters/decrypting_demuxer_stream.cc
@@ -11,6 +11,7 @@
 #include "base/single_thread_task_runner.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/decoder_buffer.h"
+#include "media/base/encryption_scheme.h"
 #include "media/base/media_log.h"
 
 namespace media {
@@ -347,14 +348,12 @@ void DecryptingDemuxerStream::InitializeDecoderConfig() {
     case AUDIO: {
       AudioDecoderConfig input_audio_config =
           demuxer_stream_->audio_decoder_config();
-      audio_config_.Initialize(input_audio_config.codec(),
-                               input_audio_config.sample_format(),
-                               input_audio_config.channel_layout(),
-                               input_audio_config.samples_per_second(),
-                               input_audio_config.extra_data(),
-                               false,  // Output audio is not encrypted.
-                               input_audio_config.seek_preroll(),
-                               input_audio_config.codec_delay());
+      audio_config_.Initialize(
+          input_audio_config.codec(), input_audio_config.sample_format(),
+          input_audio_config.channel_layout(),
+          input_audio_config.samples_per_second(),
+          input_audio_config.extra_data(), EncryptionScheme::Unencrypted(),
+          input_audio_config.seek_preroll(), input_audio_config.codec_delay());
       break;
     }
 
@@ -366,7 +365,7 @@ void DecryptingDemuxerStream::InitializeDecoderConfig() {
           input_video_config.format(), input_video_config.color_space(),
           input_video_config.coded_size(), input_video_config.visible_rect(),
           input_video_config.natural_size(), input_video_config.extra_data(),
-          false);  // Output video is not encrypted.
+          EncryptionScheme::Unencrypted());
       break;
     }