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### Preflight Checklist
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* [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 for a feature request that matches the one I want to file, without success.

### Problem Description
<!-- Is your feature request related to a problem? Please add a clear and concise description of what the problem is. -->

They is no way to choose the paper format (A4, A3, Letter, ...) when printing with `webContents.print()`.

### Proposed Solution
<!-- Describe the solution you'd like in a clear and concise manner -->

Add something like the `pageSize` option which is available in [`webContents.printToPDF()`](https://electronjs.org/docs/api/web-contents#contentsprinttopdfoptions-callback).

shell/browser/api/electron_api_web_contents.cc
const std::string& channel,
                              blink::CloneableMessage arguments,
                              MessageSyncCallback callback) {
  TRACE_EVENT1("electron", "Ws::MessageSync", "channel", channel);
  // ws.emit('-ipc-message-sync', new Event(sender, message), internal,
  // channel, arguments);
  EmitWithSender("-ipc-message-sync", bindings_.dispatch_context(),
                 std::move(callback), internal, channel, std::move(arguments));
}
void Ws::MessageTo(bool internal,
                            bool send_to_all,
                            int32_t ontents_id,
                            const std::string& channel,
                            blink::CloneableMessage arguments) {
  TRACE_EVENT1("electron", "Ws::MessageTo", "channel", channel);
  auto* ontents = gin_helper::TrackableObject<Ws>::FromWeakMapID(
      isolate(), ontents_id);
  if (ontents) {
    ontents->SendIPCMessageWithSender(internal, send_to_all, channel,
                                           std::move(arguments), ID());
  }
}
void Ws::MessageHost(const std::string& channel,