Uniformize WebSocketMessageType

Change-Id: I26d0f193804773d5835413deb4f4e26d30ea711a
diff --git a/client/src/contexts/ConversationProvider.tsx b/client/src/contexts/ConversationProvider.tsx
index 3c24896..d518c64 100644
--- a/client/src/contexts/ConversationProvider.tsx
+++ b/client/src/contexts/ConversationProvider.tsx
@@ -105,9 +105,9 @@
     };
 
     webSocket.send(WebSocketMessageType.ConversationView, conversationView);
-    webSocket.bind(WebSocketMessageType.OnComposingStatusChanged, onComposingStatusChanged);
+    webSocket.bind(WebSocketMessageType.ComposingStatus, onComposingStatusChanged);
 
-    return () => webSocket.unbind(WebSocketMessageType.OnComposingStatusChanged, onComposingStatusChanged);
+    return () => webSocket.unbind(WebSocketMessageType.ComposingStatus, onComposingStatusChanged);
   }, [accountId, conversationInfos, conversationId, onComposingStatusChanged, webSocket]);
 
   const value = useMemo(() => {