media: Allow config change between clear and encrypted streams

content/renderer/media/cdm/ppapi_decryptor.cc

Index: content/renderer/media/cdm/ppapi_decryptor.cc
diff --git a/content/renderer/media/cdm/ppapi_decryptor.cc b/content/renderer/media/cdm/ppapi_decryptor.cc
index b76c0218f156784530d1d611d1fcb7cc769b0745..006dc3cfb4583499e62323ff841f8ff8edcf049f 100644
--- a/content/renderer/media/cdm/ppapi_decryptor.cc
+++ b/content/renderer/media/cdm/ppapi_decryptor.cc
@@ -247,6 +247,8 @@ void PpapiDecryptor::Decrypt(
     return;
   }
 
+  // TODO(xhwang): If the buffer is not encrypted, return it directly.
+
   DVLOG(3) << __func__ << " - stream_type: " << stream_type;
   if (!CdmDelegate() ||
       !CdmDelegate()->Decrypt(stream_type, encrypted, decrypt_cb)) {
@@ -278,7 +280,6 @@ void PpapiDecryptor::InitializeAudioDecoder(
   }
 
   DVLOG(2) << __func__;
-  DCHECK(config.is_encrypted());
   DCHECK(config.IsValidConfig());
 
   audio_decoder_init_cb_ = init_cb;
@@ -302,7 +303,6 @@ void PpapiDecryptor::InitializeVideoDecoder(
   }
 
   DVLOG(2) << __func__;
-  DCHECK(config.is_encrypted());
   DCHECK(config.IsValidConfig());
 
   video_decoder_init_cb_ = init_cb;