Change mojo enums to be scoped enums in the generated C++ bindings.

media/mojo/services/mojo_demuxer_stream_impl.cc

Index: media/mojo/services/mojo_demuxer_stream_impl.cc
diff --git a/media/mojo/services/mojo_demuxer_stream_impl.cc b/media/mojo/services/mojo_demuxer_stream_impl.cc
index f201fe771ee72c0bd0aa2627c1cfb5bc3f70b0c6..a443897783ed308332f38809ce000cd895472353 100644
--- a/media/mojo/services/mojo_demuxer_stream_impl.cc
+++ b/media/mojo/services/mojo_demuxer_stream_impl.cc
@@ -97,14 +97,14 @@ void MojoDemuxerStreamImpl::OnBufferReady(
                    << stream_->type();
     }
 
-    callback.Run(interfaces::DemuxerStream::STATUS_CONFIG_CHANGED,
+    callback.Run(interfaces::DemuxerStream::Status::CONFIG_CHANGED,
                  interfaces::DecoderBufferPtr(), std::move(audio_config),
                  std::move(video_config));
     return;
   }
 
   if (status == media::DemuxerStream::kAborted) {
-    callback.Run(interfaces::DemuxerStream::STATUS_ABORTED,
+    callback.Run(interfaces::DemuxerStream::Status::ABORTED,
                  interfaces::DecoderBufferPtr(), std::move(audio_config),
                  std::move(video_config));
     return;