### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.7

### What operating system are you using?

Ubuntu

### Operating System Version

5.4.0-73-generic #82~18.04.1-Ubuntu

### What arch are you using?

x64

### Last Known Working Electron version

_No response_

### Expected Behavior

`const existingPermissions = await navigator.serial.getPorts();` should return a list of serial ports for which permission has already been granted, even when a device has been unplugged and plugged back in again.

### Actual Behavior

The list is empty, even when the same code works in the browser (Chromium v90.0.4430.93).

### Testcase Gist URL

https://gist.github.com/gniezen/34950a5fa84dcf000e2b55a8d599ecd6

### Additional Information

To reproduce using gist:

- Replace `usbVendorId` and `usbProductId` with that of your test device.
- Click the `Connect` button. It should show up in the port list on the main console.
- Click the `Get Ports` button. It should show the existing permission in the developer console.
- Unplug and re-plug the device.
- Click the `Get Ports` button. It should show the existing permissions, but returns an empty list.
shell/browser/serial/serial_chooser_context.cc
SerialChooserContext::~SerialChooserContext() = default;
void SerialChooserContext::GrantPortPermission(
    const url::Origin& requesting_origin,
    const url::Origin& embedding_origin,
    const device::mojom::SerialPortInfo& port) {
  base::Value value = PortInfoToValue(port);
  port_info_.insert({port.token, value.Clone()});
  ephemeral_ports_[{requesting_origin, embedding_origin}].insert(port.token);
}
bool SerialChooserContext::HasPortPermission(
    const url::Origin& requesting_origin,
    const url::Origin& embedding_origin,
    const device::mojom::SerialPortInfo& port) {
  auto it = ephemeral_ports_.find({requesting_origin, embedding_origin});
  if (it != ephemeral_ports_.end()) {
    const std::set<base::UnguessableToken> ports = it->second;
    if (base::Contains(ports, port.token))
      return true;
  }
  return false;
}
bool SerialChooserContext::CanStorePersistentEntry(