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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
void Ws::WsDestroyed() {
  // Cleanup relationships with other parts.
  RemoveFromWeakMap();
  // We can not call Destroy here because we need to call Emit first, but we
  // also do not want any method to be used, so just mark as destroyed here.
  MarkDestroyed();
  Emit("destroyed");
  // For guest view based on OOPIF, the Ws is released by the embedder
  // frame, and we need to clear the reference to the memory.
  if (IsGuest() && managed_ontents()) {
    managed_ontents()->ReleaseWs();
    ResetManagedWs(false);
  }
  // Destroy the native class in next tick.
  base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, GetDestroyClosure());
}
void Ws::NavigationEntryCommitted(
    const content::LoadCommittedDetails& details) {
  Emit("navigation-entry-committed", details.entry->GetURL(),
       details.is_same_document, details.did_replace_entry);
}
void Ws::SetBackgroundThrottling(bool allowed) {
  background_throttling_ = allowed;
  auto* rfh = ontents()->GetMainFrame();
  if (!rfh)
    return;
  auto* rwhv = rfh->GetView();
  if (!rwhv)
    return;
  auto* rwh_impl =