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 471ae384e353741144a6fef98bbff0ae53d8ec02..f6cb9d1ca7a0faae2ccf29d120e698d930787b34 100644
--- a/media/filters/source_buffer_stream.cc
+++ b/media/filters/source_buffer_stream.cc
@@ -1580,12 +1580,6 @@ 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])) {
@@ -1612,12 +1606,6 @@ 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])) {