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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
return type_ == Type::WEB_VIEW;
}
void Ws::AttachToIframe(content::Ws* embedder_ontents,
                                 int embedder_frame_id) {
  if (guest_delegate_)
    guest_delegate_->AttachToIframe(embedder_ontents, embedder_frame_id);
}
bool Ws::IsOffScreen() const {
#if BUILDFLAG(ENABLE_OSR)
  return type_ == Type::OFF_SCREEN;
#else
  return false;
#endif
}
#if BUILDFLAG(ENABLE_OSR)
void Ws::OnPaint(const gfx::Rect& dirty_rect, const SkBitmap& bitmap) {
  Emit("paint", dirty_rect, gfx::Image::CreateFrom1xBitmap(bitmap));
}
void Ws::StartPainting() {
  auto* osr_wcv = GetOffScreenWsView();
  if (osr_wcv)
    osr_wcv->SetPainting(true);
}
void Ws::StopPainting() {
  auto* osr_wcv = GetOffScreenWsView();
  if (osr_wcv)
    osr_wcv->SetPainting(false);
}
bool Ws::IsPainting() const {