Add LayoutManager/BoxLayout APIs

lib/browser/api/box-layout.js

@@ -0,0 +1,15 @@
+'use strict'
+
+const electron = require('electron')
+
+const {LayoutManager} = electron
+const {BoxLayout} = process.atomBinding('box_layout')
+
+Object.setPrototypeOf(BoxLayout.prototype, LayoutManager.prototype)
+
+BoxLayout.prototype._init = function () {
+  // Call parent class's _init.
+  LayoutManager.prototype._init.call(this)
+}
+
+module.exports = BoxLayout

lib/browser/api/layout-manager.js

@@ -0,0 +1,8 @@
+'use strict'
+
+const {LayoutManager} = process.atomBinding('layout_manager')
+
+LayoutManager.prototype._init = function () {
+}
+
+module.exports = LayoutManager

lib/browser/api/module-list.js

@@ -2,6 +2,7 @@
 module.exports = [
   {name: 'app', file: 'app'},
   {name: 'autoUpdater', file: 'auto-updater'},
+  {name: 'BoxLayout', file: 'box-layout'},
   {name: 'BrowserView', file: 'browser-view'},
   {name: 'BrowserWindow', file: 'browser-window'},
   {name: 'contentTracing', file: 'content-tracing'},
@@ -9,6 +10,7 @@ module.exports = [
   {name: 'globalShortcut', file: 'global-shortcut'},
   {name: 'ipcMain', file: 'ipc-main'},
   {name: 'inAppPurchase', file: 'in-app-purchase'},
+  {name: 'LayoutManager', file: 'layout-manager'},
   {name: 'Menu', file: 'menu'},
   {name: 'MenuItem', file: 'menu-item'},
   {name: 'net', file: 'net'},