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### Preflight Checklist
<!-- Please ensure you've completed the following steps by replacing [ ] with [x]-->

* [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
bool Ws::IsCrashed() const {
  return ontents()->IsCrashed();
}
void Ws::SetUserAgent(const std::string& user_agent,
                               gin_helper::Arguments* args) {
  ontents()->SetUserAgentOverride(user_agent, false);
}
std::string Ws::GetUserAgent() {
  return ontents()->GetUserAgentOverride();
}
v8::Local<v8::Promise> Ws::SavePage(
    const base::FilePath& full_file_path,
    const content::SavePageType& save_type) {
  gin_helper::Promise<void> promise(isolate());
  v8::Local<v8::Promise> handle = promise.GetHandle();
  auto* handler = new SavePageHandler(ontents(), std::move(promise));
  handler->Handle(full_file_path, save_type);
  return handle;
}
void Ws::OpenDevTools(gin_helper::Arguments* args) {
  if (type_ == Type::REMOTE)
    return;
  if (!enable_devtools_)
    return;
  std::string state;
  if (type_ == Type::WEB_VIEW || !owner_window()) {
    state = "detach";
  }
  bool activate = true;
  if (args && args->Length() == 1) {