Change error message for WebSocket tunnel failure.

net/websockets/websocket_test_util.h

Index: net/websockets/websocket_test_util.h
diff --git a/net/websockets/websocket_test_util.h b/net/websockets/websocket_test_util.h
index 5c7db80eac748fe676394e5b221cf39866bc38ff..d6c8d58be67efe28e0eb37b56ff67e1177578f3a 100644
--- a/net/websockets/websocket_test_util.h
+++ b/net/websockets/websocket_test_util.h
@@ -123,6 +123,11 @@ struct WebSocketTestURLRequestContextHost {
   void AddSSLSocketDataProvider(
       scoped_ptr<SSLSocketDataProvider> ssl_socket_data);
 
+  // Allow a proxy to be set. Usage:
+  //   SetProxyService(make_scoped_ptr(ProxyService::CreateFixed("pro1:8000")))
+  // Must be called prior to GetURLRequestContext().
+  void SetProxyService(scoped_ptr<ProxyService> proxy_service);
+
   // Call after calling one of SetExpections() or AddRawExpectations(). The
   // returned pointer remains owned by this object.
   TestURLRequestContext* GetURLRequestContext();