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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
sender_id);
  }
  return true;
}
bool Ws::SendIPCMessageToFrame(bool internal,
                                        bool send_to_all,
                                        int32_t frame_id,
                                        const std::string& channel,
                                        v8::Local<v8::Value> args) {
  blink::CloneableMessage message;
  if (!gin::ConvertFromV8(isolate(), args, &message)) {
    isolate()->ThrowException(v8::Exception::Error(
        gin::StringToV8(isolate(), "Failed to serialize arguments")));
    return false;
  }
  auto frames = ontents()->GetAllFrames();
  auto iter = std::find_if(frames.begin(), frames.end(), [frame_id](auto* f) {
    return f->GetRoutingID() == frame_id;
  });
  if (iter == frames.end())
    return false;
  if (!(*iter)->IsRenderFrameLive())
    return false;
  mojo::AssociatedRemote<mojom::ElectronRenderer> electron_renderer;
  (*iter)->GetRemoteAssociatedInterfaces()->GetInterface(&electron_renderer);
  electron_renderer->Message(internal, send_to_all, channel, std::move(message),
                             0 /* sender_id */);
  return true;
}
void Ws::SendInputEvent(v8::Isolate* isolate,