refactor: convert more files to typescript (#16820)

lib/browser/api/exports/electron.js

@@ -10,6 +10,11 @@ common.defineProperties(exports)
 for (const module of moduleList) {
   Object.defineProperty(exports, module.name, {
     enumerable: !module.private,
-    get: common.memoizedGetter(() => require(`@electron/internal/browser/api/${module.file}.js`))
+    get: common.memoizedGetter(() => {
+      const value = require(`@electron/internal/browser/api/${module.file}.js`)
+      // Handle Typescript modules with an "export default X" statement
+      if (value.__esModule) return value.default
+      return value
+    })
   })
 }

lib/browser/api/protocol.ts

@@ -1,29 +1,29 @@
-'use strict'
-
-const { app, session } = require('electron')
+import { app, session } from 'electron'
 
 // Global protocol APIs.
-module.exports = process.atomBinding('protocol')
+const protocol = process.atomBinding('protocol')
 
 // Fallback protocol APIs of default session.
-Object.setPrototypeOf(module.exports, new Proxy({}, {
+Object.setPrototypeOf(protocol, new Proxy({}, {
   get (target, property) {
     if (!app.isReady()) return
 
-    const protocol = session.defaultSession.protocol
+    const protocol = session.defaultSession!.protocol
     if (!Object.getPrototypeOf(protocol).hasOwnProperty(property)) return
 
     // Returning a native function directly would throw error.
-    return (...args) => protocol[property](...args)
+    return (...args: any[]) => (protocol[property as keyof Electron.Protocol] as Function)(...args)
   },
 
   ownKeys () {
     if (!app.isReady()) return []
 
-    return Object.getOwnPropertyNames(Object.getPrototypeOf(session.defaultSession.protocol))
+    return Object.getOwnPropertyNames(Object.getPrototypeOf(session.defaultSession!.protocol))
   },
 
   getOwnPropertyDescriptor (target) {
     return { configurable: true, enumerable: true }
   }
 }))
+
+export default protocol