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-rw-r--r--cast/common/channel/cast_message_handler.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/cast/common/channel/cast_message_handler.h b/cast/common/channel/cast_message_handler.h
index cd0d13e6..e478d156 100644
--- a/cast/common/channel/cast_message_handler.h
+++ b/cast/common/channel/cast_message_handler.h
@@ -17,6 +17,7 @@ class CastMessageHandler {
public:
virtual ~CastMessageHandler() = default;
+ // |socket| is null if the source of the message is a local peer.
virtual void OnMessage(VirtualConnectionRouter* router,
CastSocket* socket,
::cast::channel::CastMessage message) = 0;