Add "electron" module

atom/browser/api/lib/exports/electron.coffee

@@ -0,0 +1,47 @@
+# Import common modules.
+module.exports = require '../../../../common/api/lib/exports/electron'
+
+Object.defineProperties module.exports,
+  # Browser side modules, please sort with alphabet order.
+  app:
+    enumerable: true
+    get: -> require '../app'
+  autoUpdater:
+    enumerable: true
+    get: -> require '../auto-updater'
+  BrowserWindow:
+    enumerable: true
+    get: -> require '../browser-window'
+  contentTracing:
+    enumerable: true
+    get: -> require '../content-tracing'
+  dialog:
+    enumerable: true
+    get: -> require '../dialog'
+  ipcMain:
+    enumerable: true
+    get: -> require '../ipc-main'
+  globalShortcut:
+    enumerable: true
+    get: -> require '../global-shortcut'
+  Menu:
+    enumerable: true
+    get: -> require '../menu'
+  MenuItem:
+    enumerable: true
+    get: -> require '../menu-item'
+  powerMonitor:
+    enumerable: true
+    get: -> require '../power-monitor'
+  powerSaveBlocker:
+    enumerable: true
+    get: -> require '../power-save-blocker'
+  protocol:
+    enumerable: true
+    get: -> require '../protocol'
+  screen:
+    enumerable: true
+    get: -> require '../screen'
+  tray:
+    enumerable: true
+    get: -> require '../tray'