--- a/electron/shell/browser/serial/electron_serial_delegate.h	2022-09-16 12:31:19.704082600 +0200
+++ b/electron/shell/browser/serial/electron_serial_delegate.h	2022-09-16 21:30:57.247975900 +0200
@@ -38,9 +38,9 @@
   device::mojom::SerialPortManager* GetPortManager(
       content::RenderFrameHost* frame) override;
   void AddObserver(content::RenderFrameHost* frame,
-                   Observer* observer) override;
+                   content::SerialDelegate::Observer* observer) override;
   void RemoveObserver(content::RenderFrameHost* frame,
-                      Observer* observer) override;
+                      content::SerialDelegate::Observer* observer) override;
 
   void DeleteControllerForFrame(content::RenderFrameHost* render_frame_host);