feat: add WebContentsView API

lib/browser/api/web-contents-view.js

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