Missing include

electron_app/src/preload.js

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-const { ipcRenderer } = require('electron');
+const { ipcRenderer, webFrame } = require('electron');
 
 // expose ipcRenderer to the renderer process
 window.ipcRenderer = ipcRenderer;