<!--  As an open source project with a dedicated but small maintainer team, it can sometimes take a long time for issues to be addressed so please be patient and we will get back to you as soon as we can.
-->

### 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
CommonWsDelegate::ExitFullscreenModeForTab(source);
  Emit("leave-html-full-screen");
}
void Ws::RendererUnresponsive(
    content::Ws* source,
    content::RenderWidgetHost* render_widget_host,
    base::RepeatingClosure hang_monitor_restarter) {
  Emit("unresponsive");
}
void Ws::RendererResponsive(
    content::Ws* source,
    content::RenderWidgetHost* render_widget_host) {
  Emit("responsive");
  for (ExtendedWsObserver& observer : observers_)
    observer.OnRendererResponsive();
}
bool Ws::HandleContextMenu(content::RenderFrameHost* render_frame_host,
                                    const content::ContextMenuParams& params) {
  if (params.custom_context.is_pepper_menu) {
    Emit("pepper-context-menu", std::make_pair(params, ontents()),
         base::BindOnce(&content::Ws::NotifyContextMenuClosed,
                        base::Unretained(ontents()),
                        params.custom_context));
  } else {
    Emit("context-menu", std::make_pair(params, ontents()));
  }
  return true;
}
bool Ws::OnGoToEntryOffset(int offset) {