* **Electron Version** (output of `node_modules/.bin/electron --version`):
  * v4.0.5
* **Operating System** (Platform and Version):
  *  Windows 10 

### Expected Behavior
using  webContents api to print an html file oriention  set to landscape in default printer settings and page size set to A5, 

mainWindow.webContents.print({ silent: true, printBackground: false, deviceName: 'HP LaserJet 1020' })

My issue is : it is not printing as defined in the default printer settings

but it currently printing is deviceName not set

and need to send mainWindow.webContents.print() api to silently and printer name 

### To Reproduce
If you provide a URL, please list the commands required to clone/setup/run your repo e.g.
```sh
$ git clone git@github.com:shabeer-mdy/electron-quick-start.git
$ npm install
$ npm start || electron .
```
and set any printer name to  mainWindow.webContents.print({ silent: true, printBackground: false, deviceName: 'HP LaserJet 1020' })

set any installed printer name 



shell/browser/api/atom_api_web_contents.cc
dpi_settings.Get("vertical", &vertical);
    settings.SetInteger(printing::kSettingDpiVertical, vertical);
  } else {
    settings.SetInteger(printing::kSettingDpiHorizontal, dpi);
    settings.SetInteger(printing::kSettingDpiVertical, dpi);
  }
  auto* print_view_manager =
      printing::PrintViewManagerBasic::FromWebContents(web_contents());
  auto* focused_frame = web_contents()->GetFocusedFrame();
  auto* rfh = focused_frame && focused_frame->HasSelection()
                  ? focused_frame
                  : web_contents()->GetMainFrame();
  print_view_manager->PrintNow(
      rfh,
      std::make_unique<PrintMsg_PrintPages>(rfh->GetRoutingID(), silent,
                                            print_background, settings),
      std::move(callback));
}
std::vector<printing::PrinterBasicInfo> WebContents::GetPrinterList() {
  std::vector<printing::PrinterBasicInfo> printers;
  auto print_backend = printing::PrintBackend::CreateInstance(nullptr);
  {
    
    
    base::ThreadRestrictions::ScopedAllowIO allow_io;
    print_backend->EnumeratePrinters(&printers);
  }
  return printers;
}
v8::Local<v8::Promise> WebContents::PrintToPDF(