Add some comments

1 files changed, 2 insertions, 1 deletions

diff --git a/src/core/ext/filters/client_channel/client_channel_channelz.h b/src/core/ext/filters/client_channel/client_channel_channelz.h
index a9e98deedb..8ce331e529 100644
--- a/src/core/ext/filters/client_channel/client_channel_channelz.h
+++ b/src/core/ext/filters/client_channel/client_channel_channelz.h
@@ -83,7 +83,8 @@ class SubchannelNode : public BaseNode {
   void AddTraceEventWithReference(ChannelTrace::Severity severity,
                                   grpc_slice data,
                                   RefCountedPtr<BaseNode> referenced_channel) {
-    trace_.AddTraceEventWithReference(severity, data, referenced_channel);
+    trace_.AddTraceEventWithReference(severity, data,
+                                      std::move(referenced_channel));
   }
   void RecordCallStarted() { call_counter_.RecordCallStarted(); }
   void RecordCallFailed() { call_counter_.RecordCallFailed(); }