* **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
options.Get("landscape", &landscape);
  settings.SetBoolean(printing::kSettingLandscape, landscape);
  base::string16 device_name;
  options.Get("deviceName", &device_name);
  settings.SetString(printing::kSettingDeviceName, device_name);
  int scale_factor = 100;
  options.Get("scaleFactor", &scale_factor);
  settings.SetInteger(printing::kSettingScaleFactor, scale_factor);
  int pages_per_sheet = 1;
  options.Get("pagesPerSheet", &pages_per_sheet);
  settings.SetInteger(printing::kSettingPagesPerSheet, pages_per_sheet);
  bool collate = true;
  options.Get("collate", &collate);
  settings.SetBoolean(printing::kSettingCollate, collate);
  int copies = 1;
  options.Get("copies", &copies);
  settings.SetInteger(printing::kSettingCopies, copies);
  bool print_background = false;
  options.Get("printBackground", &print_background);
  settings.SetBoolean(printing::kSettingShouldPrintBackgrounds,
                      print_background);
  
  
  settings.SetBoolean(printing::kSettingPrintToPDF, false);
  settings.SetBoolean(printing::kSettingCloudPrintDialog, false);
  settings.SetBoolean(printing::kSettingPrintWithPrivet, false);
  settings.SetBoolean(printing::kSettingShouldPrintSelectionOnly, false);
  settings.SetBoolean(printing::kSettingPrintWithExtension, false);
  settings.SetBoolean(printing::kSettingRasterizePdf, false);