media: Prefer decrypting pipeline when CDM is attached

media/base/audio_decoder_config.h

Index: media/base/audio_decoder_config.h
diff --git a/media/base/audio_decoder_config.h b/media/base/audio_decoder_config.h
index 266de82d605277543a3fec40b2c5a8faec165266..675eb87232ceb5cd722550e7fe02fb50b30ca068 100644
--- a/media/base/audio_decoder_config.h
+++ b/media/base/audio_decoder_config.h
@@ -87,6 +87,12 @@ class MEDIA_EXPORT AudioDecoderConfig {
     return encryption_scheme_;
   }
 
+  // Sets the config to be encrypted or not encrypted manually. This can be
+  // useful for decryptors that decrypts an encrypted stream to a clear stream,
+  // or for decoder selectors that wants to select decrypting decoders instead
+  // of clear decoders.
+  void SetIsEncrypted(bool is_encrypted);
+
  private:
   AudioCodec codec_;
   SampleFormat sample_format_;