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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
Emit("zoom-changed", zoom_in ? "in" : "out");
}
void Ws::EnterFullscreenModeForTab(
    content::Ws* source,
    const GURL& origin,
    const blink::mojom::FullscreenOptions& options) {
  auto* permission_helper =
      WsPermissionHelper::FromWs(source);
  auto callback =
      base::BindRepeating(&Ws::OnEnterFullscreenModeForTab,
                          base::Unretained(this), source, origin, options);
  permission_helper->RequestFullscreenPermission(callback);
}
void Ws::OnEnterFullscreenModeForTab(
    content::Ws* source,
    const GURL& origin,
    const blink::mojom::FullscreenOptions& options,
    bool allowed) {
  if (!allowed)
    return;
  CommonWsDelegate::EnterFullscreenModeForTab(source, origin, options);
  Emit("enter-html-full-screen");
}
void Ws::ExitFullscreenModeForTab(content::Ws* source) {