fix: crash on invalid select-serial-port callback (#28602)

shell/browser/serial/serial_chooser_controller.cc

@@ -124,9 +124,13 @@ void SerialChooserController::OnDeviceChosen(const std::string& port_id) {
         std::find_if(ports_.begin(), ports_.end(), [&port_id](const auto& ptr) {
           return ptr->token.ToString() == port_id;
         });
-    chooser_context_->GrantPortPermission(requesting_origin_, embedding_origin_,
-                                          *it->get());
-    RunCallback(it->Clone());
+    if (it != ports_.end()) {
+      chooser_context_->GrantPortPermission(requesting_origin_,
+                                            embedding_origin_, *it->get());
+      RunCallback(it->Clone());
+    } else {
+      RunCallback(/*port=*/nullptr);
+    }
   }
 }
 

spec-main/chromium-spec.ts

@@ -1586,6 +1586,14 @@ describe('navigator.serial', () => {
     expect(port).to.equal('NotFoundError: No port selected by the user.');
   });
 
+  it('does not crash when select-serial-port is called with an invalid port', async () => {
+    w.webContents.session.on('select-serial-port', (event, portList, webContents, callback) => {
+      callback('i-do-not-exist');
+    });
+    const port = await getPorts();
+    expect(port).to.equal('NotFoundError: No port selected by the user.');
+  });
+
   it('returns a port when select-serial-port event is defined', async () => {
     w.webContents.session.on('select-serial-port', (event, portList, webContents, callback) => {
       callback(portList[0].portId);