media: Allow config change between clear and encrypted streams

media/filters/source_buffer_stream.cc

Index: media/filters/source_buffer_stream.cc
diff --git a/media/filters/source_buffer_stream.cc b/media/filters/source_buffer_stream.cc
index 82fe81f1f26b327420c16937386caab7fbfeec4e..4c7e8c1afc327f203049bf914684ac57e42b4bcb 100644
--- a/media/filters/source_buffer_stream.cc
+++ b/media/filters/source_buffer_stream.cc
@@ -1533,12 +1533,6 @@ bool SourceBufferStream::UpdateAudioConfig(const AudioDecoderConfig& config) {
     return false;
   }
 
-  if (!audio_configs_[0].encryption_scheme().Matches(
-          config.encryption_scheme())) {
-    MEDIA_LOG(ERROR, media_log_) << "Audio encryption changes not allowed.";
-    return false;
-  }
-
   // Check to see if the new config matches an existing one.
   for (size_t i = 0; i < audio_configs_.size(); ++i) {
     if (config.Matches(audio_configs_[i])) {
@@ -1565,12 +1559,6 @@ bool SourceBufferStream::UpdateVideoConfig(const VideoDecoderConfig& config) {
     return false;
   }
 
-  if (!video_configs_[0].encryption_scheme().Matches(
-          config.encryption_scheme())) {
-    MEDIA_LOG(ERROR, media_log_) << "Video encryption changes not allowed.";
-    return false;
-  }
-
   // Check to see if the new config matches an existing one.
   for (size_t i = 0; i < video_configs_.size(); ++i) {
     if (config.Matches(video_configs_[i])) {